simple past tense and past participle of flex

plural of flexing

(uncountable) Flexibility, pliancy. / (countable) An act of flexing. / (uncountable, chiefly Britain) Any flexible insulated electrical wiring.

(transitive, chiefly physics or biomechanics) To bend something. / (transitive) To repeatedly bend one of one's joints. / (transitive) To move part of the body using one's muscles.

present participle of flex

The action of the verb flex; a bending of something, a tightening of the muscles.

Third-person singular simple present indicative form of flex

plural of flex

plural of flex account

Short for flexible spending account.