BEHIND TIME

{adv.} or {adj. phr.} 1a. Behind the correct time; slow. * /That clock is behind time./ 1b. Behind schedule; late. * /The train is running behind time today./ 2. Not keeping up; not at the proper time; overdue. * /Your lessons are good, but why are you behind time?/ * /We are behind time in paying the rent./ Contrast: AHEAD OF TIME, IN TIME, ON TIME.