Definition of "Rock" :

noun: pitching dangerously to one side

noun: a genre of popular music originating in the 1950s; a blend of black rhythm-and-blues with white country-and-western

"Rock is a generic term for the range of styles that evolved out of rock'n'roll.."

noun: hard bright-colored stick candy (typically flavored with peppermint)

noun: a lump or mass of hard consolidated mineral matter

"He threw a rock at me."

noun: (figurative) someone who is strong and stable and dependable

"He was her rock during the crisis."

noun: United States gynecologist and devout Catholic who conducted the first clinical trials of the oral contraceptive pill (1890-1984)

noun: material consisting of the aggregate of minerals like those making up the Earth's crust

"That mountain is solid rock."

verb: move back and forth or sideways

"The ship was rocking."

verb: cause to move back and forth

"Rock the cradle."