noun

• A formation of minerals, specifically:
  "The face of the cliff is solid rock."
• A formation of minerals, specifically:
  "Some fool has thrown a rock through my window."
• A formation of minerals, specifically:
• A formation of minerals, specifically:
  "Look at the size of that rock on her finger!"

verb

• (transitive and intransitive) To move gently back and forth.
  "Rock the baby to sleep."
• (transitive) To cause to shake or sway violently.
  "Don't rock the boat."
• (intransitive) To sway or tilt violently back and forth.
  "The boat rocked at anchor."
• (transitive and intransitive, of ore etc.) To be washed and panned in a cradle or in a rocker.
  "The ores had been rocked and laid out for inspection."

noun

• (music) A style of music characterized by basic drum-beat, generally 4/4 riffs, based on (usually electric) guitar, bass guitar, drums, keyboards (often), and vocals.

verb

• (intransitive) To play, perform, or enjoy rock music, especially with a lot of skill or energy.
  "Let's rock!"
• (intransitive, slang) To be very favourable or skilful; excel; be fantastic.
  "Chocolate rocks."
• (transitive) To thrill or excite, especially with rock music.
  "Let's rock this joint!"
• (intransitive) To have people dancing and enjoying rock music.
  "The scene was rocking, all were digging the sounds Igor on chains, backed by his baying hounds The coffin-bangers were about to arrive With their vocal group, The Crypt-Kicker Five."