- To express certain emotions, especially mirth or delight, by a series of spontaneous, usually unarticulated sounds often accompanied by corresponding facial and bodily movements. (verb-intransitive)
- To show or feel amusement or good humor: an experience we would laugh about later on. (verb-intransitive)
- To feel or express derision or contempt; mock: I had to laugh when I saw who my opponent was. (verb-intransitive)
- To feel a triumphant or exultant sense of well-being: You won't be laughing when the truth comes out. (verb-intransitive)
- To produce sounds resembling laughter: parrots laughing and chattering in the trees. (verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.