noun

• A toothed implement:
• A crest:
  "The head-dress of the Horse Grenadiers consists of a peculiar leather helmet with a comb of bear's skin passing over it from ear to ear and a long scarlet […]"
• (music) The main body of a harmonica containing the air chambers and to which the reed plates are attached.
• (algebraic geometry) A connected and reduced curve with irreducible components consisting of a smooth subcurve (called the handle) and one or more additional irreducible components (called teeth) that each intersect the handle in a single point that is unequal to the unique point of intersection for any of the other teeth.

verb

• (transitive, especially of hair or fur) To groom with a toothed implement, especially a comb.
  "I need to comb my hair before we leave the house."
• (transitive) To separate choice cotton fibers from worsted cloth fibers.
• (transitive) To search thoroughly as if raking over an area with a comb.
  "Police combed the field for evidence after the assault."
• (nautical, intransitive) To roll over, as the top or crest of a wave; to break with a white foam, as waves.

noun

• (rare) Abbreviation of combination.

noun

• (dialectal) Alternative form of coomb.
  "[Regarding a period of agricultural depression] Even on the good land where the farmer hadn't enough capital to look after it and have it properly drained he couldn't hold on. He'd be getting a yield of eight combs of wheat and ten combs of barley per acre. But that wasn't good enough: it gave him no leeway. This is understandable when you recollect the price of wheat at that time."