What does "pawl" mean?

Pawl: A pivoted tongue, or sliding bolt, on one part of a machine, adapted to fall into notches, or interdental spaces, on another part, as a ratchet wheel, in such a manner as to permit motion in one direction and prevent it in the reverse, as in a windlass; a catch, click, or detent. See Illust. of Ratchet Wheel. [Written also paul, or pall.] Pawl bitt (Naut.), a heavy timber, set abaft the windlass, to receive the strain of the pawls. -- Pawl rim or ring (Naut.), a stationary metallic ring surrounding the base of a capstan, having notches for the pawls to catch in.