ROCK, noun [Gr., Latin rupes, from the root of rumpo, to break or burst. If this is not the origin of rock I know not to what root to assign it.]

1. A large mass of stony matter, usually compounded of two or more simple minerals, either bedded in the earth or resting on its surface. Sometimes rocks compose the principal part of huge mountains; sometimes hugh rocks lie on the surface of the earth, in detached blocks or masses. Under this term, mineralogists class all mineral substances, coal, gypsum, salt, etc.

2. In Scripture, figuratively, defense; means of safety; protection; strength; asylum.

The Lord is my rock 2 Samuel 22:2.

3. Firmness; a firm or immovable foundation. Psalms 28:1.

Matthew 7:24. Matthew 16:18.

4. A species of vulture or condor.

5. A fabulous bird in the Eastern tales.

ROCK, noun

A distaff used in spinning; the staff or frame about which flax is arranged, from which the thread is drawn in spinning.

ROCK, verb transitive

1. To move backward and forward, as a body resting on a foundation; as, to rock a cradle; to rock a chair; to rock a mountain. It differs from shake, as denoting a slower and more uniform motion, or larger movements. It differs from swing, which expresses a vibratory motion of something suspended.

A rising earthquake rock'd the ground.

2. To move backwards and forwards in a cradle, chair, etc.; as, to rock a child to sleep.

3. To lull to quiet.

Sleep rock thy brain. [Unusual.]

ROCK, verb intransitive To be moved backwards and forwards; to reel.

The rocking town supplants their footsteps.