rock

noun

• A formation of minerals, specifically:
• A large hill or island having no vegetation.

  "Pearl Rock near Cape Cod is so named because the morning sun makes it gleam like a pearl."

• Something that is strong, stable, and dependable; a person who provides security or support to another.
• A lump or cube of ice.

  "I'll have a whisky on the rocks, please."

• A type of confectionery made from sugar in the shape of a stick, traditionally having some text running through its length.

  "While we're in Brighton, let's get a stick of rock!"

• A crystallized lump of crack cocaine.
• An unintelligent person, especially one who repeats mistakes.
• An Afrikaner.
• An extremely conservative player who is willing to play only the very strongest hands.
• Any of several fish:
• A basketball.

  "Yo homie, pass the rock!"

• (rock paper scissors) A closed hand (a handshape resembling a rock), that beats scissors and loses to paper. It beats lizard and loses to Spock in rock-paper-scissors-lizard-Spock.
• A cricket ball, especially a new one that has not been softened by use
• A crystal used to control the radio frequency.