To bend; bow.To curl; become wrinkled; shrivel up.To yield assent; agree: with to: as, I can't buckle to that.To bend to something; apply one's self with vigor; engage in with zeal: with to: as, “go, buckle to the law,”To enter upon some labor or contest; struggle; contend: with with.To bend; curl; shrivel as by the application of heat.n. A bend, bulge, or kink, as in a saw-blade.n. A contorted expression of the face.n. Any curl of hair, especially a long curl carefully arranged, and turned toward the head, worn by women in the eighteenth century.n. The condition of being curled, as of hair.n. A clasp consisting of a rectangular or curved rim, with one or more movable tongues secured to the chape at one side or in the middle, and long enough to rest upon the opposite side: used for fastening together two straps or belts or the ends of the same strap, or for some similar purpose.n. In heraldry, same as arming-buckle.n. An iron loop for fastening the blade to the frame of a wood-saw.To fasten with a buckle or buckles.To prepare for action of any kind (a metaphor taken from buckling on armor previous to engaging in battle); hence, to set vigorously to work at anything: with a reflexive pronoun.To join in battle.To confine or limit.To join together; unite in marriage.To marry.To do up (the hair) in curlpapers; curl; crimp. See buckle, n., 3.