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