Stitch  —n. 1 a (in sewing, knitting, or crocheting) single pass of a needle, or the resulting thread or loop etc. B particular method of sewing etc. 2 least bit of clothing (hadn't a stitch on). 3 sharp pain in the side induced by running etc. —v. Sew; make stitches (in).  in stitches colloq. Laughing uncontrollably. Stitch up 1 join or mend by sewing. 2 slang trick, cheat, betray. [old english: related to *stick2]