ethereal

Etymology

It is borrowed from Latin aetherius (“of the upper air; heavenly”), also aethereus, with the English suffix -al,^{[2][3][4][5][6]} from Ancient Greek αἰθέριος (aithérios, “high in the air, heavenly”),^[2][6][5] from αἰθήρ (aithḗr, “upper air”).^[2][6] The OED explains the Latin ending “-eus” as an alteration after adjectives of that type.^[2] Etymonline instead derives the English word from ether and -ial,^[7] and the Greek noun from a verb meaning "to burn, shine", from Proto-Indo-European *aidh- (“to burn”).^[7] It was formerly also spelled “etherial”, and also “aethereal”.^[7][4][3]

Earliest recorded meaning

Heavenly, of the gods: before 1522, in G. Douglas's translation of Virgil's Aeneid.^[2] Etymonline dates the word to the 1510s, in the sense "of the highest regions of the atmosphere",^[7] and Merriam-Webster to about 1522.^[3]

Semantic evolution

The sense "of the sky or upper regions beyond the clouds" is recorded from 1530, and for some three centuries the word was also used of the lower air.^[2] From 1590 it described things of the nature of the ether of ancient cosmology, extremely light and airy;^[2][7] from 1642 it was used of things spiritual or immaterial, or of a delicacy that seems not of this world.^[2][7] Johnson (1755) defined it as "formed of ether" and "celestial; heavenly", quoting Milton's "ethereal messenger".^[8] Science gave it two further senses: in physics, of the luminiferous ether (1651, in Hobbes), and in chemistry, of or containing diethyl ether (1794).^[2] As a noun it has meant an ethereal being or spirit since 1610.^[2]

Timeline

• before 1522 – heavenly, celestial.^[2]
• 1530 – of the sky or the upper regions of the atmosphere.^[2][7]
• c. 1550 – of the air or lower atmosphere (obsolete after 1830).^[2]
• 1590 – of the nature of ether; extremely light, airy.^[2][7]
• 1610 – noun, an ethereal being, a spirit.^[2]
• 1642 – spiritual, immaterial; of unearthly delicacy.^[2][7]
• 1651 – physics, of the luminiferous ether.^[2]
• 1794 – chemistry, of or containing ether.^[2]

Meanings

Adjective

1. Extremely delicate, light or refined, as if not of this world: the ethereal sound of the choir.^[9][3][2]
2. Not material; spiritual or intangible.^[9][3][2]
3. (chiefly poetic) Heavenly or celestial.^[9][3][2]
4. (chiefly literary) Of the regions of the sky beyond the earth.^[3][2]
5. (chemistry) Of, resembling or dissolved in ether.^[9][2][4]
6. (physics, historical) Of the luminiferous ether.^[9][2]

Noun

1. An ethereal being; a spirit.^[2][4]

Word family

• ethereality
• ethereally
• etherealization
• etherealness
• ethereous
• etherealize
• nonethereal
• unethereal

Related words

• ether

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b c d Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
5. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
6. ^ a b c The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
7. ^ a b c d e f g h i Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
8. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
9. ^ a b c d e Collins English Dictionary (2023), Glasgow: HarperCollins