Of small or limited width, especially in comparison with length. Limited in area or scope; cramped. Lacking flexibility; rigid: narrow opinions. Barely sufficient; close: a narrow margin of victory. Painstakingly thorough or attentive; meticulous: narrow scrutiny. Linguistics Tense. To reduce in width or extent; make narrower. To limit or restrict: narrowed the possibilities down to three. To become narrower; contract. A part of little width, as a pass through mountains. A body of water with little width that connects two larger bodies of water. A part of a river or an ocean current that is not wide.