This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To bend (something pliant or elastic).

v. To bend (a joint).

v. To bend (a joint) repeatedly.

v. To contract (a muscle, for example).

v. To move by muscular control: "Sandy flexes his brow characteristically” ( Scott Turow).

v. To exhibit or show off the strength of: "They had spent six years since the lightning Six Day War flexing their invincibility” ( Howard Kaplan).

verb-intransitive. To bend: "His hands flexed nervously as he spoke” ( Mary McCarthy).

n. Chiefly British Flexible insulated electric cord.

n. The act or an instance of flexing; a bending.

n. Pliancy; flexibility: "'Resolution' has none of that modern flex we favor, with generous, built-in amounts of 'maybe'” ( Melvin Maddocks).

idiom. flex (one's) muscles Informal To exhibit or show off one's strength.

n. Flexibility, pliancy.

n. The act of flexing.

n. Any flexible insulated electrical wiring.

n. A point of inflection.

v. To bend something.

v. To repeatedly bend one of one's joints.

v. To move part of the body using one's muscles.

v. To tighten the muscles for display of size or strength.

v. To bend.

n. Flax.

To bend; make a flexure of: specifically said in anatomy of the action of any flexor muscle.

n. An obsolete variant of flax.

n. A point of contrary flexure or a point of inflexion.

v. contract

v. cause (a plastic object) to assume a crooked or angular form

v. form a curve

n. the act of flexing

v. bend a joint

v. exhibit the strength of

"CLANCY: And it's a whole industry, because you've to have your cars -- in Brazil, you find most of the cars are what they call flex vehicles, so they can either run on ethanol, or they can run on regular unleaded gas."

flexed    flexing   

contract    shrink    flexure    flexion    move    flash    show off    swank    flaunt    ostentate   

flexed    flexing   

bend    flax   

Czechs    Ex    Lex    Rex    Tex    Triplex    X    aix    annex    becks   

twitch    tickle