Definitions of comb:

• noun:   the act of drawing a comb through hair

  Example: "His hair needed a comb"

• noun:   the fleshy red crest on the head of the domestic fowl and other gallinaceous birds
• noun:   ciliated comb-like swimming plate of a ctenophore
• noun:   a flat device with narrow pointed teeth on one edge; disentangles or arranges hair
• noun:   any of several tools for straightening fibers
• noun:   a fleshy and deeply serrated outgrowth atop the heads of certain birds especially domestic fowl
• verb:   smoothen and neaten with or as with a comb

  Example: "Comb your hair before dinner"

• verb:   search thoroughly

  Example: "They combed the area for the missing child"

• verb:   straighten with a comb

  Example: "Comb your hair"