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Definition of flex

flex

/flɛks/
flex

Adverb:flexibly
•
Plural:flexes
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Adjective:flexible
•
Past Simple:flexed
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Past Participle:flexed
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Present Participle:flexing
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flex Lexical Profile

flex Game Scores & Validity

• noun

1

An ostentatious or boastful display of one's wealth, achievements, or status (slang).

Example

"Posting photos of his private jet was seen by many as an unnecessary flex."


2

The act or an instance of bending a joint or contracting a muscle.

Example

"With a quick flex of his wrist, the fencer deflected the incoming blade."


3

British A flexible insulated electrical cord or cable used to connect an appliance to a power source.

Example

"Make sure the kettle's flex is not frayed before plugging it into the wall socket."

Synonyms
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Antonyms
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• verb

1

To bend a limb, joint, or pliable object, or to become bent.

Example

"The physical therapist asked the patient to slowly flex her knee to test her range of motion."


2

To contract or tighten a muscle, especially to make it stand out or to demonstrate physical strength.

Example

"The bodybuilder stood on stage and began to flex his biceps for the judges."


3

To boast, brag, or show off one's wealth, abilities, or possessions in an ostentatious manner (slang).

Example

"He loves to flex on social media whenever he buys a new luxury watch."

Synonyms
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Antonyms
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• Rhymes for flex

Word Origin & Etymology

Borrowed in the early 16th century from the Latin 'flexus', the past participle of 'flectere', meaning 'to bend or curve'. The modern slang sense of boasting originated in late 20th-century hip-hop culture, metaphorically extending the image of flexing one's muscles to display strength or status.

Cite this Entry


Wordmom. (2026). Definition of Flex. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/flex
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