(n.) A fellow; -- used humorously or contemptuously; as, a sly dog; a lazy dog.
(n.) A grappling iron, with a claw or claws, for fastening into wood or other heavy articles, for the purpose of raising or moving them.
(n.) A mean, worthless fellow; a wretch.
(n.) A piece in machinery acting as a catch or clutch; especially, the carrier of a lathe, also, an adjustable stop to change motion, as in a machine tool.
(n.) A quadruped of the genus Canis, esp. the domestic dog (C. familiaris).
(n.) An iron for holding wood in a fireplace; a firedog; an andiron.
(n.) An iron with fangs fastening a log in a saw pit, or on the carriage of a sawmill.
(n.) One of the two constellations, Canis Major and Canis Minor, or the Greater Dog and the Lesser Dog. Canis Major contains the Dog Star (Sirius).
(v. t.) To hunt or track like a hound; to follow insidiously or indefatigably; to chase with a dog or dogs; to worry, as if by dogs; to hound with importunity.