Definition of "Gap" :

noun: an act of delaying or interrupting the continuity

"There was a gap in his account."

noun: a narrow opening

noun: a conspicuous disparity or difference as between two figures

"Gap between income and outgo."

noun: a difference (especially an unfortunate difference) between two opinions or two views or two situations

noun: a pass between mountain peaks

noun: an open or empty space in or between things

"The explosion made a gap in the wall."

verb: make an opening or gap in