Phrase guide

under the knife

prep_phrase · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ˌʌndə ðə ˈnaɪf/
  • General-American: /ˌʌndəɹ ðə ˈnaɪf/
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -aɪf

1

prep_phrase

Meaning 1

Chiefly preceded by a form of go: undergoing a surgical procedure; into surgery.

Definition source: English Wiktionary via Wiktextract

Usage: informal

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

A reference to the situation of a patient lying on an operating table while a surgeon stands over them and operates using a surgical cutting tool (typically a scalpel).

Across languages

Translations

14 source translations are retained for this English entry.

  • Chinese Mandarin: 開刀 /开刀 (kāidāo) — undergoing a surgical procedure
  • Danish: under kniven — undergoing a surgical procedure
  • Dutch: onder het mes — undergoing a surgical procedure
  • Finnish: leikkaukseen — undergoing a surgical procedure
  • French: passer sur le billard — undergoing a surgical procedure
  • French: sur le billard — undergoing a surgical procedure
  • German: unters Messer — undergoing a surgical procedure
  • German: unter dem Messer — undergoing a surgical procedure
  • Irish: faoi scian — undergoing a surgical procedure
  • Italian: sotto i ferri — undergoing a surgical procedure
  • Norwegian: under kniven — undergoing a surgical procedure
  • Spanish: bajo el cuchillo — undergoing a surgical procedure
  • Swedish: under kniven — undergoing a surgical procedure
  • Welsh: dan y gyllell — undergoing a surgical procedure