flex

1
[ fleks ]
/ flɛks /

verb (used with object)

to bend, as a part of the body: He flexed his arms to show off his muscles.
to tighten (a muscle) by contraction.

verb (used without object)

to bend.

noun

the act of flexing.
British.
  1. any flexible, insulated electric cord; an electric cord or extension cord.
  2. Slang. an elastic band, as a garter.
Mathematics. an inflection point.

Origin of flex

1
1515–25; (adj.) < Latin flexus, past participle of flectere to bend, turn; (noun) < Latin flexus act of bending, equivalent to flect(ere) + -tus suffix of v. action
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for flexing

British Dictionary definitions for flexing

flex
/ (flɛks) /

noun

British a flexible insulated electric cable, used esp to connect appliances to mainsUS and Canadian name: cord
informal flexibility or pliability

verb

to bend or be benthe flexed his arm; his arm flexed
to contract (a muscle) or (of a muscle) to contract
(intr) to work according to flexitime
to test or display (one's authority or strength)

Word Origin for flex

C16: from Latin flexus bent, winding, from flectere to bend, bow
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

Medicine definitions for flexing

flex
[ flĕks ]

v.

To bend.
To contract a muscle.
To move a joint so that the parts it connects approach each other.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.