1 a : the measured or measurable period during which an action, process, or condition exists or continues : duration b : a nonspatial continuum that is measured in terms of events which succeed one another from past through present to future c : leisure <time for reading>
2 : the point or period when something occurs : occasion
3 a : an appointed, fixed, or customary moment or hour for something to happen, begin, or end <arrived ahead of time> b : an opportune or suitable moment <decided it was time to retire> —often used in the phrase about time <about time for a change>
Etymology: Middle English, from Old English tīma; akin to Old Norse tīmi time, Old English tīd — more at tide
Date: before 12th century