rock2

verb

• 1move gently to and fro or from side to side: [with object]:she rocked the baby in her arms [no object]:the vase rocked back and forth on its base (as adjective rocking)the rocking movement of the boat
• (with reference to a building or region) shake or cause to shake or vibrate, especially because of an impact, earthquake, or explosion: [with object]:minutes later a second blast rocked the city [no object]:the building began to rock on its foundations
• [with object] cause great shock or distress to (someone or something), especially so as to weaken or destabilize:diplomatic upheavals that rocked the British Empire

• 2 [no object] informal dance to or play rock music: he looked a totally different man and ready to rock
• (of a place) be exciting or full of social activity:the new town really rocks (as adjective rocking)a rocking resort
• be very good or pleasing:this is when the job really rocks

• 3 [with object] informal wear (a garment) or affect (an attitude or style), especially in a confident or flamboyant way:she was rocking a clingy little leopard-skin number

noun

• 1 [mass noun] rock music: [as modifier]:a rock star
• rock and roll.

• 2a gentle movement to and fro or from side to side:she placed the baby in the cot and gave it a rock