Definition was a Canadian television game show, which aired on CTV from 1974 to 1989. The show was hosted by Bob McLean for its first season and by Jim Perry thereafter.

Like the later Wheel of Fortune (which Perry ironically appeared on as a celebrity player in 1980), Definition was essentially a variation on the word game Hangman. Two contestants appeared on each show, each paired with a celebrity guest. The contestant/celebrity pairs would take turns guessing letters in a phrase for which Perry had offered a pun as a clue. First, the pair would "give" a letter to the opposing team, hoping that letter did not appear in the puzzle. If the "given" letter did not appear -- which was usually the case, since teams would choose a seldom-used letter like Z or Q -- the team could choose a letter for themselves. If this was a correct letter, they could take another turn or guess the phrase. But if an incorrect letter was guessed, the pair's turn would end and the opposing team's turn started.

The show, while popular in Canada, was also sometimes mocked for the cheapness of its prizes, which were usually small kitchen appliances, pen and pencil sets, or other small courtesy gifts. Only the show's annual championship tournaments offered the types of expensive prizes, such as a car or a resort vacation, that were commonplace on American game shows.

The show's theme song was taken from an instrumental jazz piece by Quincy Jones, "Soul Bossa Nova". It was sampled by the Canadian hip hop band Dream Warriors in their 1991 hit "My Definition of a Boombastic Jazz Style", and was later also used as the theme music for Mike Myers' Austin Powers movies.

Definition was among the longest-running game shows in Canadian television, and made host Jim Perry a household name during the 1970s and 1980s in the same manner as his U.S. counterpart Bob Barker. Perry hosted Definition concurrently with hosting several American game shows, including Card Sharks and Sale of the Century, as well as another Canadian game show, Headline Hunters. Between 1978 and 1981, Perry presided over three game shows at once: Card Sharks, Definition and Headline Hunters.