Foul (foul), n. [See Fowl.] A bird. [Obs.] Chaucer.
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Foul (?), v. t. [imp. & p. p. Fouled (?); p. pr. & vb. n. Fouling.] 1. To make filthy; to defile; to daub; to dirty; to soil; as, to foul the face or hands with mire.
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2. (Mil.) To incrust (the bore of a gun) with burnt powder in the process of firing.
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3. To cover (a ship's bottom) with anything that impered its sailing; as, a bottom fouled with barnacles.
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4. To entangle, so as to impede motion; as, to foul a rope or cable in paying it out; to come into collision with; as, one boat fouled the other in a race.
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Foul, n. 1. An entanglement; a collision, as in a boat race.
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2. (Baseball) See Foul ball, under Foul, a.
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3. In various games or sports, an act done contrary to the rules; a foul stroke, hit, play, or the like.
[Webster 1913 Suppl.]