Definition of rock:

part of speech: verb

To move backward and forward, as in a cradle, a chair, & c.; to lull; to quiet; to be moved backward and forward.

part of speech: adjective

Hard like rock; resembling or composed of rocks.

part of speech: noun

A large mass of stone bedded in the earth's crust, or resting on its surface; figuratively, defence; protection; immovability; a hard stalk of sweetmeat.

part of speech: noun

The staff or frame about which flax or wool is arranged, and from which the thread is drawn in spinning.

Usage examples:

Word of the day

pin money

Money allowed to a wife for her private expenses. ...