flex definition

1. the act of flexing
• examples: he gave his biceps a flex to impress the ladies
2. contract
• examples: flex a muscle
3. exhibit the strength of
• examples: The victorious army flexes its invincibility
4. bend a joint
• examples: flex your wrists
• examples: bend your knees
5. cause (a plastic object) to assume a crooked or angular form
• examples: bend the rod
• examples: twist the dough into a braid
• examples: the strong man could turn an iron bar