rock · noun /rɑk/
rock (MUSIC)
A2 U loud, modern music with a strong beat, often played with electric guitars and drums
Dictionary examples:
rock music
a rock group
a rock star
Learner example:
I like rock music. (Key English Test; A2; Turkish)
rock (HARD SUBSTANCE)
B1 C or U the hard, natural substance that forms part of the earth's surface, or an area of this substance sticking out of the sea or ground
Dictionary examples:
a layer of rock
Mountains and cliffs are formed from rock.
Waves crashed against the rocks.
We climbed over the rocks and up to the top of the hill.
Learner example:
There are many wonderful hills, mountains, lakes, caves and rocks. (Preliminary English Test; B1; Slovak)
rock · verb /rɑk/
rock
C2 I or T to move backward and forward or from side to side, or to make someone or something do this
Dictionary examples:
She rocked back and forth on her chair.
He gently rocked the baby to sleep.
Learner example:
The violent storm was rocking the ship back and forth. (Certificate of Proficiency in English; C2; Italian)
rock the boat
C2 to do or say something that changes a situation in a way that causes problems
Dictionary example:
They seemed very happy and I didn't want to rock the boat.
Learner example:
But let's not rock the boat. Our preposterous cravings and wishes might become our [down]fall. (Certificate of Proficiency in English; C2; Danish)
