rock

noun

1. a large mass of stone forming a peak or cliff
2. 1. a large stone detached from the mass; boulder
   2. broken pieces of any size of such stone
   3. any stone, large or small
3. 1. mineral matter variously composed, formed in masses or large quantities in the earth's crust by the action of heat, water, etc.
   2. a particular kind or mass of this
4. anything like or suggesting a rock, as in strength or stability; esp., a firm support, basis, refuge, etc.
5. ☆ rockfish
6. 1. Chiefly Brit. a hard candy made in sticks
   2. rock candy
7. Slang a diamond or other gem
8. ☆ Slang crack cocaine or a single piece of it

transitive verb

1. to move or sway back and forth or from side to side (a cradle, a child in the arms, etc.), esp. in a gentle, quieting manner
2. to bring into a specified condition by moving or swaying in this way: to rock a baby to sleep
3. 1. to move or sway strongly; shake; cause to tremble or vibrate: the explosion rocked the house
   2. to upset emotionally
4. Engraving to prepare the surface of (a plate) for a mezzotint by roughening with a rocker (sense )
5. Mining to wash (sand or gravel) in a rocker (sense )

intransitive verb

1. to move or sway back and forth or from side to side, as a cradle
2. to move or sway strongly; shake; vibrate
3. to be rocked, as ore

noun

1. the act of rocking
2. a rocking motion
3. ☆
   1. rock-and-roll
   2. popular music evolved from rock-and-roll, variously containing elements of folk music, country music, etc. and now often emphasizing loudness, distortion, the use of electronic synthesizers, etc.