n [ U ]
1. ( also rock music ) a type of modern popular music with a strong beat, played with electric guitars, drums, etc. It developed in the 1960s from rock and roll . Famous rock groups include the Rolling Stones , Genesis and KISS . Rock later developed into forms such as folk rock and heavy metal .
2. ( BrE ) a type of hard sugar sweet, usually made in long sticks which are flavoured with peppermint and coloured (usually bright pink) on the outside. In Britain, rock is sold especially in seaside towns, and has the name of the town all through the length of the stick on the inside:
He bought her a stick of Brighton rock as a present
See also Edinburgh rock .