Synergy refers to a cooperative effort or interaction between two or more parties, where their combined effect is greater than the sum of their individual effects. It implies that when individuals work together in an organized and coordinated way, they can achieve much more than if each person worked independently towards the same goal. The term synergy comes from the Greek words "syn" meaning together and "ergon" meaning work or action. In essence, it means that the whole is greater than the sum of its parts when people work together effectively.