sway meaning, definition, what is sway: to move slowly from one side to another...: Learn more. 11 meanings: 1. to swing or cause to swing to and fro 2. to lean or incline or cause to lean or incline to one side or in.... Click for more definitions. sway (countable and uncountable, plural sways) The act of swaying; a swaying motion; a swing or sweep of a weapon. A rocking or swinging motion. The old song caused a little sway in everyone in the room. I doubt I'll hold much sway with someone so powerful. Definition of sway in the Definitions.net dictionary. Meaning of sway. What does sway mean? Information and translations of sway in the most comprehensive dictionary definitions resource on the web.