intransitive verb
Definition: To move gently back and forth or from side to side, often in a rhythmic way.
Example: The baby began to rock in her crib as she fell asleep.
noun
Definition: A solid mineral material that makes up the Earth's surface, which can be large like a mountain or small like a pebble.
Example: He picked up a smooth rock from the riverbank.
transitive verb
Definition: To move something back and forth or side to side, often to soothe or disturb it.
Example: She rocked the baby gently to help him fall asleep.