rock

1 rock /ˈrɑːk/ verb
rocks; rocked; rocking
1 rock
/ˈrɑːk/
verb
rocks; rocked; rocking
Britannica Dictionary definition of ROCK
1 
: to move (someone or something) back and forth or from side to side
[+ object]
[no object]
2 
[+ object] : to cause (something) to shake violently
— sometimes used figuratively
3 
[+ object] informal
a  : to cause (someone or something) to be upset or shocked
b  : to affect or influence (someone or something) very powerfully
c  : to entertain (someone) in a very powerful and effective way
4 
[no object] informal : to sing, dance to, or play rock music
5 
[no object] slang : to be very enjoyable, pleasing, or effective

rock out

[phrasal verb] informal
: to play music in a loud or energetic way

rock the boat

— see 1boat

— rocking

noun, plural rockings [count, noncount]
2 rock /ˈrɑːk/ noun
plural rocks
2 rock
/ˈrɑːk/
noun
plural rocks
Britannica Dictionary definition of ROCK
1 
a  [noncount] : the hard, solid material that the surface of the Earth is made of
— often used before another noun — see also bedrock, sheetrock
b  [count] : a piece of rock
c  [count] : a large piece of rock that sticks up from the surface of the Earth
2 
— used in phrases to say that something is very hard, steady, etc.
3 
[singular] informal
a  : a strong person who can be relied on
b  : someone whose ideas, values, ways of doing things, etc., do not change
4 
[count] informal : a diamond or other jewel
5 
[noncount] British : hard candy that is made in a stick — compare rock candy
6 
[count] informal : a small hard piece of a drug

between a rock and a hard place

informal
: in a very difficult or bad position or situation with no good way of getting out of it

get your rocks off

informal
1 
of a man : to have an orgasm
2 
: to feel great pleasure or satisfaction

live under a rock

: to be unaware of things that most people know about

on the rocks

1 
: having a lot of problems and likely to fail
2 
of an alcoholic drink : with ice cubes
3 rock /ˈrɑːk/ noun
3 rock
/ˈrɑːk/
noun
Britannica Dictionary definition of ROCK
[noncount]
: a kind of popular music with a strong beat that is played on instruments that are made louder electronically — often used before another noun — see also hard rock, soft rock