Operation Meaning

/ˌɒp.əˈɹeɪ.ʃən/
B1

Definition, CEFR level B1, pronunciation, examples, and quiz.

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nounThe method by which a device performs its function.

nounThe method or practice by which actions are done.

I had an operation for glaucoma last year.
The surgeon persuaded me to undergo an organ transplant operation.
Will I need to have an operation?
CEFR Practice Quiz
The experienced doctor scheduled the heart ____ for early morning tomorrow.
CEFR Practice Quiz (Alternate)
The military ____ was carried out under the cover of darkness to avoid detection by the enemy.

Etymology tree Proto-Indo-European *h₃ep- Proto-Indo-European *-os Proto-Indo-European *h₃épos Proto-Italic *opos Latin opus Latin opera Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Italic *-āō Latin -or Latin operor Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin operātiōder. Old French operacionbor. Middle English operacioun English operation From Middle English operacioun, from Old French operacion, from Latin operātiō, from the verb operor (“to work”), from opus, operis (“work”). Equivalent to operate + -ion.

"the pain and sickness caused by manna are confessedly nothing but the effects of its operations on the stomach and guts." — 1689 (indicated as 1690), [John Locke], chapter 2, in An Essay Concerning Humane Understanding. […], London: […] Eliz[abeth] Holt, for Thomas Basset, […], →OCLC, book I, page 8:
"Speculative painting, without the assistance of manual operation, can never attain to perfection." — 1695, C[harles] A[lphonse] du Fresnoy, translated by John Dryden, De Arte Graphica. The Art of Painting, […], London: […] J[ohn] Heptinstall for W. Rogers, […], →OCLC:
"This done, ſhe performs the very ſame Operation on the other Side of the Cock's Body, and there takes out the other Stone; then ſhe ſtitches up the Wounds, and lets the Fowl go about as at other Times, till the Capon is fatted in a Coup, which is commonly done from Chriſtmas to Candlemas, and after." — 1750, W[illiam] Ellis, The Country Housewife's Family Companion […] , London: James Hodges; B. Collins, →OCLC, page 157:
"The bards […] had great operation on the vulgar." — 1655, Thomas Fuller, The Church-history of Britain; […], London: […] Iohn Williams […], →OCLC, (please specify |book=I to XI):

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CEFR Practice Quiz
The experienced doctor scheduled the heart ____ for early morning tomorrow.
CEFR Practice Quiz (Alternate)
The military ____ was carried out under the cover of darkness to avoid detection by the enemy.

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