fretsaw noun 1verb 1forms 4 noun1 •A saw consisting of a metal frame having a fine-toothed narrow blade held under tension, used in making curved cuts.She led Dr Grimsby out to the workshop, where Peter was at work on the marquetry table. He had the two veneers clamped together and was cutting the inlay pattern with the finest of fretsaws. — 1950 verb1 •To cut with a fretsaw. formsfretsawed · fretsawn · fretsawing · fretsaws