I. ˈfleks verb
Etymology: Latin flexus, past participle of flectere to bend
Date: circa 1521
transitive verb
1. : to bend especially repeatedly
2.
a. : to move muscles so as to cause flexion of (a joint)
b. : to move or tense (a muscle) by contraction
3. : use , demonstrate
flex ing her skills as a singer
intransitive verb
: bend
•
- flex one's muscles
II. noun
Etymology: short for flexible cord
Date: 1905
chiefly British : an electric cord
III. noun
Date: circa 1934
: an act or instance of flexing