Foul anchor. (Naut.) See under Anchor.

Foul ball (Baseball), a ball that first strikes the ground outside of the foul ball lines, or rolls outside of certain limits.

Foul ball lines (Baseball), lines from the home base, through the first and third bases, to the boundary of the field.

Foul berth (Naut.), a berth in which a ship is in danger of fouling another vesel.

Foul bill, or Foul bill of health, a certificate, duly authenticated, that a ship has come from a place where a contagious disorder prevails, or that some of the crew are infected.

Foul copy, a rough draught, with erasures and corrections; -- opposed to fair or clean copy. ``Some writers boast of negligence, and others would be ashamed to show their foul copies.'' --Cowper.

Foul proof, an uncorrected proof; a proof containing an excessive quantity of errors.

Foul strike (Baseball), a strike by the batsman when any part of his person is outside of the lines of his position.

To fall foul, to fall out; to quarrel. [Obs.]

``If they be any ways offended, they fall foul.'' --Burton.

To fall, or run, foul of. See under Fall.

To make foul water, to sail in such shallow water that the ship's keel stirs the mud at the bottom.

Source: Webster's Revised Unabridged Dictionary (1913)