TIME GAP is a phrase used to describe the difference between two points in time. The two crossword solutions for this term are INTERIM (7 letters) and LAG (3 letters). INTERIM is an adjective that means 'TEMPORARY' or 'occurring in the intervening time'. LAG is a verb that means 'to be or become behind in movement, progress, or development'. Together, these two words can be used to describe the gap between two points in time.