1. Bend a joint
   "flex your wrists";
   - bend
    
2. Contract
   "flex a muscle"
    
3. Exhibit the strength of
   "The victorious army flexes its invincibility"
    
4. [N. Amer, informal] Display proudly; act ostentatiously or pretentiously
   "He flexed his new sports car around town";
   - flaunt, flash [informal], show off, ostentate [archaic], swank [informal], showboat [N. Amer, informal], parade
    
5. Form a curve
   "The stick does not flex";
   - bend
    
6. Cause (an object) to assume a crooked or angular form
   "flex the rod";
   - bend, deform, twist, turn

1. [Brit] An electrical power cord
   "He replaced the damaged flex on the lamp"
    
2. The act of flexing
   "he gave his biceps a flex to impress the ladies"
    
3. [N. Amer, informal] An act of boasting or flaunting something
   "His social media post was just a flex to show off his new car"

Sounds like: flew, flu, fflex, fl

Derived forms: flexes, flexed, flexing

Type of: change form, change shape, contract, deform, display, exhibit, expose, flexion, flexure, move, shrink

Antonym: unbend

Encyclopedia: Flex, David