flatten

[ flat-n ]
/ ˈflæt n /

verb (used with object)

to make flat.
to knock down: The boxer flattened his opponent in the second round.

verb (used without object)

to become flat.

Verb Phrases

flatten in, Nautical. flat1(def 61).
flatten out, Aeronautics. to fly into a horizontal position, as after a dive.

Nearby words

  1. flatmate,
  2. flatness,
  3. flats,
  4. flatscreen,
  5. flatstick,
  6. flatter,
  7. flatter oneself,
  8. flattered,
  9. flatterer,
  10. flattering

Origin of flatten

First recorded in 1620–30; flat1 + -en1

Related formsflat·ten·er, nouno·ver·flat·ten, verb (used with object)un·flat·tened, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for flatten


British Dictionary definitions for flatten

flatten

/ (ˈflætən) /

verb

(sometimes foll by out) to make or become flat or flatter
(tr) informal
  1. to knock down or injure; prostrate
  2. to crush or subduefailure will flatten his self-esteem
(tr) music to lower the pitch of (a note) by one chromatic semitoneUsual US word: flat
(intr foll by out) to manoeuvre an aircraft into horizontal flight, esp after a dive
Derived Formsflattener, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for flatten

flatten

v.

late 14c., "to prostrate oneself," also "to fall flat," from flat (adj.) + -en (1). Meaning "to make flat" is 1620s. Related: Flattened; flattening.

Online Etymology Dictionary, © 2010 Douglas Harper