n. 1.one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.) 2.edible muscle of mollusks having fan-shaped shells 3.thin slice of meat (especially veal) usually fried or broiled 4.edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions scallop v. 1.decorate an edge with scallops 2.form scallops in 3.fish for scallops 4.shape or cut in scallops