(dialect, dated) The spiny dogfish.

Alternative form of guard dog

(countable, US, American football) A blitz. / (uncountable) The lowest grade of flour in milling, secured largely from the germ or embryo and adjacent parts, and mainly useful as animal feed.

(US, American football) To blitz.

A card game in which players bet on the next card to appear.

(US, historical) Any of the members of a Cheyenne Indian military society in the mid 19th century.

(euphemistic) depression, melancholy / Used other than figuratively or idiomatically: see black, dog.

A feral child who lives as a dog, outside human society. / (often humorous) A dog, treated as if a child of the owner.

(obsolete) A dog with a docked tail; formerly, the dog of a person not qualified to course, which, by the forest laws, must have its tail cut short, partly as a mark, and partly from a notion that the tail is necessary to a dog in running.

The plant hound's tongue.