rock

SUBSTANCE

A2the hard substance that forms part of the earth's surface

• The house was built on solid rock.

STONE

A2a large piece of stone

• The boat hit a rock.
• We sat on a rock by the sea.

MUSIC

A2loud music with a strong beat, played on electric guitars and drums

• I love rock music.

B2to move gently from side to side, or to make something do this

• She rocked the baby to sleep.