flaw /flɔː/noun 9verb 2forms 3 noun9 •A crack or breach, a gap or fissure; a defect of continuity or cohesion.There is a flaw in that knife.That vase has a flaw. •A defect, fault, or imperfection, especially one that is hidden.Has not this also its flaws and its dark side? — 1692 •An inclusion, stain, or other defect of a diamond or other gemstone. •A defect or error in a contract or other document which may make the document invalid or ineffective.a flaw in a will, in a deed, or in a statute •A sudden burst or gust of wind of short duration; windflaw.Yniol with that hard message went; it fell, / Like flaws in summer laying lusty corn: […] — 1859 •A storm of short duration. •A sudden burst of noise and disorderAnd deluges of armies from the town / Come pouring in; I heard the mighty flaw. — 1675 •(no longer used) A flake, fragment, or shiver. •(no longer used) A thin cake, as of ice. verb2 •To add a flaw to, to make imperfect or defective. •To become imperfect or defective; to crack or break. formsflawed · flawing · flaws