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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. Form a curve
   "The stick does not flex";
   - bend
    
5. Cause (an object) to assume a crooked or angular form
   "flex the rod";
   - bend, deform, twist, turn

1. [Brit] An electrical power cord
    
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

Sounds like: flew, flu, fflex, fl

Derived forms: flexing, flexed, flexes

Type of: change form, change shape, contract, deform, flash [informal], flaunt, flexion, flexure, move, ostentate [archaic], parade, show off, showboat [N. Amer, informal], shrink, swank [informal]

Encyclopedia: Flex, David