Definitions of scallop:

• noun:   edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions
• noun:   edible muscle of mollusks having fan-shaped shells; served broiled or poached or in salads or cream sauces
• noun:   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.)
• noun:   thin slice of meat (especially veal) usually fried or broiled
• verb:   fish for scallops
• verb:   form scallops in

  Example: "Scallop the meat"

• verb:   shape or cut in scallops

  Example: "Scallop the hem of the dress"

• verb:   decorate an edge with scallops

  Example: "The dress had a scalloped skirt"