rock

US /rɑːk/
UK /rɑːk/
"rock" picture
1.

the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans.

:
The mountain was made of solid rock.
We climbed over the jagged rocks.
2.

a type of popular music originating in the 1950s, characterized by a strong beat and the use of guitars, drums, and bass.

:
She loves listening to classic rock music.
The band played a loud rock anthem.
1.

to move gently to and fro or from side to side.

:
She began to rock the baby to sleep.
The boat began to rock in the strong waves.
2.

to cause a sensation of shock or alarm in (someone).

:
The news of his resignation really rocked the company.
The scandal rocked the political establishment.