Definitions

1. adjective

firm in consistency or texture; not soft or pliable

“The stiff dough was difficult to knead.”

2. noun

a sudden movement of the body, especially a jerk or jolt

“The car’s stiff took us by surprise.”

3. noun

a person who is formal or lacking in warmth or friendliness

“He’s a bit of a stiff at social gatherings.”

4. verb

to make or become stiff, especially as a result of injury or illness

“The athlete’s back had stiffened after the fall.”