[uncountable, countable] the hard solid material that forms part of the surface of the earth and some other planets. They drilled through several layers of rock ...

rock · ​ · ​ · ​[intransitive, transitive] to shake or to make something shake violently · ​[intransitive] (old-fashioned) to dance to rock music · ​ · ​[transitive] ...

hard material [uncountable, countable] the hard, solid material that forms part of the surface of the earth and some other planets.

A large rugged mass of hard mineral material (see sense I.2a) or stone forming a cliff, crag, or other natural feature on land or in the sea.

rock · 1[intransitive, transitive] to move gently backward and forward or from side to side; to make someone or something move in this way (+ adv./prep.) · 2[ ...

There are 30 meanings listed in OED's entry for the verb rock, two of which are labelled obsolete. See 'Meaning & use' for definitions, usage, and quotation ...

a type of loud popular music, developed in the 1960s, with a strong beat played on electric guitars and drums

(also rock 'n' roll) [uncountable] a type of music popular in the 1950s with a strong beat and simple tunes.

noun /ˌhɑːd ˈrɒk/ /ˌhɑːrd ˈrɑːk/ [uncountable] a type of loud rock music with a very strong beat, played on electric guitars.

rock-hard adjective /ˌrɒk ˈhɑːd/ /ˌrɑːk ˈhɑːrd/ extremely hard or strong Questions about grammar and vocabulary? Find the answers with Practical English Usage ...