Gap meaning : An opening in anything made by breaking or parting. An opening allowing passage or entrance. An opening that implies a breach or defect. A vacant space or time. A hiatus, a pause in something which is otherwise continuous. A vacancy, deficit, absence, or lack. A mountain or hill pass. A sheltered area of coast between two cliffs (mostly restricted to place names). The regions between the outfielders. (for a medical or pharmacy item) The shortfall between the amount the medical insurer will pay to the service provider and the scheduled fee for the item. (usually written as "the gap") The disparity between the indigenous and non-indigenous communities with regard to life expectancy, education, health, etc. An unsequenced region in a sequence alignment. To notch, as a sword or knife. To make an opening in; to breach. To check the size of a gap. To leave suddenly.