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flatten

[flat-n] /ˈflæt n/
verb (used with object)
1.
to make flat.
2.
to knock down:
The boxer flattened his opponent in the second round.
verb (used without object)
3.
to become flat.
Verb phrases
4.
flatten in, Nautical. flat1 (def 61).
5.
flatten out, Aeronautics. to fly into a horizontal position, as after a dive.
Origin of flatten
1620-1630
1620-30; flat1 + -en1
Related forms
flattener, noun
overflatten, verb (used with object)
unflattened, adjective
Synonyms
2. ground, fell, prostrate, deck, floor.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for flatten
Contemporary Examples
Historical Examples
  • He meant to flatten out a hundred feet or so above them and shout, "For I'm a rider of the sky!"

    Skyrider B. M. Bower
  • Raise tacks and sheets, round with the main-yard, and flatten in forward.

    The Voyage of the Aurora Harry Collingwood
  • They had just time to flatten themselves against the crag, which, fortunately, hung over them.

    The Spell of Switzerland Nathan Haskell Dole
  • You could flatten out a piece of iron with your little lady-like arms.

    L'Assommoir Emile Zola
  • Cut another stick (H) an inch through and fifteen inches long, flatten a little on one side.

    Deadfalls and Snares A. R. (Arthur Robert) Harding
British Dictionary definitions for flatten

flatten

/ˈflætən/
verb
1.
(sometimes foll by out) to make or become flat or flatter
2.
(transitive) (informal)
  1. to knock down or injure; prostrate
  2. to crush or subdue: failure will flatten his self-esteem
3.
(transitive) (music) to lower the pitch of (a note) by one chromatic semitone Usual US word flat
4.
(intransitive) foll by out. to manoeuvre an aircraft into horizontal flight, esp after a dive
Derived Forms
flattener, 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
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Word Origin and History for 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
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flatten in Technology


To remove structural information, especially to filter something with an implicit tree structure into a simple sequence of leaves; also tends to imply mapping to flat ASCII. "This code flattens an expression with parentheses into an equivalent canonical form."
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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