Noun
An extinct canine (†Canis dirus) from the Pleistocene epoch, heavier and slightly larger than the modern grey wolf.
(fantasy) Synonym of warg (a larger, more vicious, wilder, wolf)
Source: en.wiktionary.orgI don't know how old my dire wolf is but she's old she's not a puppy. Source: Internet
The fossil record says the dire wolf vanished. Source: Internet