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- behind schedule
behind schedule
*behind schedule
having failed to do something by the appointed time, especially the time given on a written plan. (*Typically: be ~; fall ~; get ~.) We have to hurry and finish soon or we will fall behind schedule. The project is behind schedule by six months.
behind schedule
happening or done later than the time that was planned The project is behind schedule because several people are off sick.
Opposite of: ahead of schedule