Definition of crank:
person; a bent
piece of an axle
, or shaft
, or an arm attached at right angles
to the end of a shaft or wheel, used to impart
a circular action to a wheel or other mechanical device and create power; also used to change circular into reciprocating motion, or reciprocating into circular motion
"billy-Bob is a nasty, old crank! He chased my cat away."
to turn a crank; to cause to spin via other means, as though turned by a crank
"crank it up!"