Definition of dog:
(n) :
an animal, member of the genus
Canis (probably descended from the common
wolf) that has been
domesticated by man for thousands of years; occurs in many breeds. Scientific name:
Canis lupus familiaris; a male dog, as opposed to a
bitch (a female dog.)
"the dog barked all night."
(v) :
to go after with the intent to catch; to follow in an annoying way, to constantly be affected by
"the woman cursed him so that trouble would dog his every step."