To sink or fall to the bottom; settle, as lees from a state of motion or agitation.To cease from action, especially violent action or agitation; fall into a state of quiet; be calmed; become tranquil; abate: as, the storm subsided; passion subsides.To fall to a lower level; tend downward; sink; fall; contract after dilatation.To stop talking; be quiet; be less conspicuous: as, you had better subside.Synonyms Abate, Subside. Intermit (see abate); retire, lull.