A play on words that relies on a word’s having more than one meaning or sounding like another word. Shakespeare and other writers use puns extensively, for serious and comic purposes; in Romeo and Juliet (III.i.101), the dying Mercutio puns, "Ask for me tomorrow and you shall find me a grave man." Puns have serious literary uses, but since the eighteenth century, puns have been used almost purely for humorous effect. See also comedy.