jigsaw n 1: a portable power saw with a reciprocating blade; can be used with a variety of blades depending on the application and kind of cut; generally have a plate that rides on the surface that is being cut [syn: {saber saw}, {jigsaw}, {reciprocating saw}] 2: fine-toothed power saw with a narrow blade; used to cut curved outlines [syn: {jigsaw}, {scroll saw}, {fretsaw}]