the deliberate and humorous use of a word or phrase to suggest a difference in meaning or use, as the substitution of the slogan visualize whirled peas for visualize world peace. a play on words that are the same or similar in sound but different in meaning. Note: In def. 1, the difference in meaning of the pun may be visual or aural, or may depend on changes in syntax. In def. 2, the pun depends on a change in context.