definition of
rock

[1] #1 rock n. [stone] a lump or mass of hard consolidated mineral matter; "he threw a rock at me". wn

[2] #2 rock v. [sway, shake] move back and forth or sideways; "the ship was rocking"; "the tall building swayed"; "She rocked back and forth on her feet". wn

[3] #3 rock n. [stone] material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries". wn

[4] #4 rock v. [sway] cause to move back and forth; "rock the cradle"; "rock the baby"; "the wind swayed the trees gently". wn

[5] #5 rock n. [Rock, John Rock] United States gynecologist and devout Catholic who conducted the first clinical trials of the oral contraceptive pill (1890-1984). wn