UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈɔːɡə/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈɔgɚ/ ,USA pronunciation: respellinggər)

WordReference Random House Learner's Dictionary of American English © 2020
au•ger /ˈɔgɚ/USA pronunciation   n. [countable]
  1. Buildinga tool for boring holes.

WordReference Random House Unabridged Dictionary of American English © 2020
au•ger  gər),USA pronunciation n. 
  1. Building[Carpentry.]
    • a bit, as for a brace.
    • a boring tool, similar to but larger than a gimlet, consisting of a bit rotated by a transverse handle.
  2. Civil Engineering, Civil Engineering, BuildingSee  earth auger. 
  3. Building, Civil Engineeringa device consisting of a shaft with a broad helical flange rotating within a cylindrical casing to force bulk materials from one end to the other.
  4. Buildingsnake (def. 3a).
  • bef. 900; Middle English nauger (a nauger misdivided as an auger; compare adder, apron), Old English nafogār nave-piercer (cognate with Old Norse nafarr, Old Saxon nabugēr, Middle Dutch navegeer, Old High German nabagēr), equivalent. to nafa nave2 + gār spear; compare gore3, garlic

Collins Concise English Dictionary © HarperCollins Publishers::
auger /ˈɔːɡə/ n
  1. a hand tool with a bit shaped like a corkscrew, for boring holes in wood
  2. a larger tool of the same kind for boring holes in the ground
Etymology: 15th Century an augur, resulting from mistaken division of earlier a nauger, from Old English nafugār nave (of a wheel) spear (that is, tool for boring hubs of wheels), from nafu nave² + gār spear; see gore²
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