ākāśa: what the term means and how it is translated
ākāśa आकाश (WHO/NAMASTE nominative form: आकाशः) is an Ayurvedic technical term. It is rendered into English in 7 different ways, which is the reason this page exists: the renderings do not agree, and the difference between them changes what the term is taken to mean.
| Transliteration | ākāśa |
|---|---|
| Devanagari | आकाश (WHO/NAMASTE nominative form: आकाशः) |
| Also written | ākāśaḥ, vyoma, antarikṣa / āntarikṣa (adj.), kha (as in khādi 'ākāśa and the rest'), nabhas, ākāśīya (adj., substance with ākāśa predominant) |
| Category, as gathered | mahabhuta |
| Grouped here under | Foundations and categories |
| Classical citations | 4 |
| Citations checked | 2026-10-07 |
How it is translated, and whether the translation holds
Each rendering is given with the source that uses it. The assessment is ours.
Space element
WHO International Standard Terminologies on Ayurveda (2022) · ITA-1.9.3.1.3, p.16 (PDF p.34); description: 'Characterized by non-obstruction and responsible for the space occupied by all substances. It is the substratum of sound, perceived by the ears.' · comparator standard
WHO chose 'Space', not 'ether'. The PDF's Devanagari for this entry renders with a font glitch (आककाशः); the intended form is आकाशः.
Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that licence permits. It is deliberately absent from the downloadable dataset, which is offered under CC BY 4.0 and invites the modification a NoDerivs licence forbids.
ether/space element
NAMASTE Standardized Ayurveda Terminologies · SAT-A.217 ākāśaḥ; long definition: 'an attribute of a substance characterised by non-obstruction.' · comparator standard
NAMASTE keeps both 'ether' and 'space'. Its long definition calls ākāśa 'an attribute', which sits oddly beside its placement as a dravya; note also that NAMASTE lists ākāśa (SAT-A.217) apart from pṛthvī/jalam/tejaḥ/vāyuḥ (SAT-A.179-182, parent 179), apparently following the mūrta/amūrta dravya split (SAT-A.178 mūrtadravya, SAT-A.216 amūrtadravyam).
Reproduced unaltered and attributed from the Government of India NAMASTE terminology, which is what that licence permits. It is deliberately absent from the downloadable dataset, which is offered under CC BY 4.0 and invites the modification a NoDerivs licence forbids.
1. A free or open space, the subtle and ethereal fluid (supposed to fill and pervade the universe and to be the peculiar vehicle of life and of sound). 2. One of the five basic elements (Paṅcamahābhūtas) that make up all matter in the universe.
NIA/WHO-APW draft (2011) · SK0003, PDF p.17 · comparator draft terminology
Sense 1 is lifted almost verbatim from Monier-Williams' dictionary gloss; 'ethereal fluid' is a Victorian-physics idea, not Ayurveda. The same draft elsewhere glosses 'Akaśa; Space, synonym of Srotas' (p.157).
Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that licence permits. It is deliberately absent from the downloadable dataset, which is offered under CC BY 4.0 and invites the modification a NoDerivs licence forbids.
Sky (Vyoma)
Bhishagratna, Su.Sū. 41 · wisdomlib doc141671 · public-domain translation
ether
Bhishagratna, Su.Śā. 1 ('the five gross matters of space such as ether, air, heat...'; 'The properties of akasha (ether) are sound, the sense of hearing, porosity and differentia evolution of the veins, ligaments etc.') · wisdomlib doc142879, Bhishagratna sections 6 and 20 · public-domain translation
Ether (or Space); ether (space)
Kaviratna, Caraka Sū. 26 and Śā. 1 · archive.org BIUSante_47357 · public-domain translation
Kaviratna consistently hedges 'Ether (or Space)'; his Śā. 1 footnote gives the property of ether as 'non-resistibility' and the Sanskrit order 'Kshityaptejomarutvyoma'.
space / ether / sky
Common textbook usage · textbook usage · our paraphrase of the source, not its words
The classical passages
Each citation gives its address so a reader can check it in a printed edition, our account of what the passage establishes, and the result of reading it against its source.
Caraka SaṃhitāŚārīrasthāna 1 (Katidhāpuruṣīya):Kaviratna's printed numbers here are OCR-garbled ('5*-35' and '*34''); standard numbering 1.27 and 1.29 per Sanskrit at carakasamhitaonline.com: शब्दः स्पर्शश्च रूपं च रसो गन्धश्च तद्गुणाः||२७|| ... खरद्रवचलोष्णत्वं भूजलानिलतेजसाम्| आकाशस्याप्रतीघातो दृष्टं लिङ्गं यथाक्रमम्||२९|| · checked against the source
The great primal elements are ether (space), air, fire (or light), water, and earth. Their (respective) attributes are sound, touch, form (vision), taste, and scent. Each of the great elements has one of these attributes; while each succeeding one has (in addition) the attribute or attributes of the preceding one or ones. Thus ether has sound; air has touch and sound; fire (or light) has form (or vision) and touch and sound; water has taste and form, and touch and sound; and earth has scent, and taste, and form, and touch and sound. [...] Roughness, liquidity, mobility, and heat are (respectively) seen to be the properties of earth, water, air, and fire; while, of ether the property is non-resistibility.
Ākāśa's guṇa is śabda (sound) and its liṅga is apratīghāta (non-obstruction), the basis of the WHO/NAMASTE 'non-obstruction' definitions. Two passages joined with [...]; OCR spacing collapsed.
Suśruta SaṃhitāŚārīrasthāna 1:Bhishagratna section 20 (his numbering). Sanskrit verse 19 per siva.sh: आन्तरिक्षाः- शब्दः शब्देन्द्रियं सर्वच्छिद्रसमूहो विविक्तता च; ... (https://www.siva.sh/sushruta-samhita/sharira-sthana/1/19) · checked against the source
The properties of akasha (ether) are sound, the sense of hearing, porosity and differentia evolution of the veins, ligaments etc. into their characterised species (Viviktata.)
Suśruta's list of ākāśa-derived features in the body: sound (śabda), the auditory faculty (śabdendriya), the aggregate of all hollows (sarvacchidra-samūha), and distinctness (viviktatā). Bhishagratna renders the fourth as 'differentia evolution of the veins, ligaments etc. into their characterised species (Viviktata)', an expansive gloss of the single word viviktatā; the Sanskrit has no mention of veins or ligaments.
Suśruta SaṃhitāSūtrasthāna 41:Bhishagratna prints no verse numbers; Sanskrit at siva.sh places the pārthiva...ākāśīya descriptions in verse 4 (I confirmed the opening of verse 4, तत्र स्थूलसान्द्रमन्दस्थिरगुरुकठिनं..., but did not independently see the ākāśīya clause's closing number). · checked against the source
A thing or substance, which is smooth, unctuous, and is subtle in its nature, soft or pliant in its consistency, expansive in the internal organism), porous, soundy and non- slimy in its character without any definite taste, is called a substance of the dominant principle of sky (Akashiyam).
Suśruta's pharmacological profile of an ākāśīya dravya (no definite taste, porous, 'soundy'). Stray parenthesis and 'soundy' are as printed on the page.
Caraka SaṃhitāSūtrasthāna 26:Kaviratna prints '26' after this sentence; standard 26.11 (single prose unit ending मृदुलघुसूक्ष्मश्लक्ष्णशब्दगुणबहुलान्याकाशात्मकानि||11|| per carakasamhitaonline.com) · checked against the source
Those that are mild, light, subtile, smooth, and largely endued with the property of sound, are regarded as having Ether for their essence.
Caraka's ākāśātmaka dravya: mṛdu, laghu, sūkṣma, ślakṣṇa, śabda-guṇa-bahula.
Not to be confused with
- srotas / chidra (channels, hollows)
- Bodily hollows are ākāśa-derived (Su.Śā. 1.19 sarvacchidra-samūha; Ca.Śā. 5.4 'the hollow places are Ether'), and the NIA draft even glosses ākāśa as 'synonym of Srotas', but srotas are structures, ākāśa is the bhūta.
- luminiferous ether / 'ethereal fluid'
- 19th-century physics concept imported by 'ether' renderings (NIA draft SK0003, Bhishagratna 'Etherion'); Ayurveda's ākāśa is defined by non-obstruction and sound, not as a medium.
- śūnya / vacuum
- Ākāśa is a positive dravya with a guṇa (śabda), not emptiness.
- dik / diś (direction)
- A separate kāraṇadravya (Ca.Sū. 1.48; WHO ITA-1.9.3.1.1), often blurred with 'space' in English.
Renderings that do not hold
- ether. Still used by WHO-era comparators (NAMASTE 'ether/space'), but carries physics connotations; WHO 2022 dropped it for 'Space'. Kaviratna's hedge 'Ether (or Space)' and his gloss 'non-resistibility' show the translators themselves felt the gap.
- Etherion. Bhishagratna's footnote to Su.Sū. 41 (a now-abandoned 1900s hypothetical gas), explicitly a modern-science equivalence by the translator, not the text.
- sky. Bhishagratna 'Sky (Vyoma)', 'principle of sky (Akashiyam)': vyoma does mean sky, but as a mahābhūta the referent is space/non-obstruction, not the atmosphere.
Open questions
Recorded rather than resolved. Each one is something this entry cannot currently settle.
- Bhishagratna's 'differentia evolution of the veins, ligaments etc.' for viviktatā needs a Sanskritist's check.
- Kaviratna's printed numbers for Ca.Śā. 1.27-29 should be read from page scans; the OCR text is unreliable there.
How to cite this entry
Age Ayurveda Nighantu, ākāśa
, https://nighantu.ageayurveda.com/lexicon/akasha/, CC BY 4.0.
The whole lexicon is downloadable from the index.
Machine-readable source: Markdown.
Data exported 2026-10-08.
Educational reference only. A term entry explains what a word means and how it has been translated. Nothing here is advice, and nothing here describes how any condition should be treated.