Laugh v. i. [imp. & p. p. Laughed p. pr. & vb. n. Laughing.]
 1. To show mirth, satisfaction, or derision, by peculiar movement of the muscles of the face, particularly of the mouth, causing a lighting up of the face and eyes, and usually accompanied by the emission of explosive or chuckling sounds from the chest and throat; to indulge in laughter.
    Queen Hecuba laughed that her eyes ran o'er.   --Shak.
    He laugheth that winneth.   --Heywood's Prov.
 2. Fig.: To be or appear gay, cheerful, pleasant, mirthful, lively, or brilliant; to sparkle; to sport.
    Then laughs the childish year, with flowerets crowned.   --Dryden.
    In Folly's cup still laughs the bubble Joy.   --Pope.
 To laugh at, to make an object of laughter or ridicule; to make fun of; to deride.
 No wit to flatter left of all his store,
 No fool to laugh at, which he valued more.   --Pope.
 -- To laugh in the sleeve, To laugh up one's sleeve, to laugh secretly, or so as not to be observed, especially while apparently preserving a grave or serious demeanor toward the person or persons laughed at.
 To laugh out, to laugh in spite of some restraining influence; to laugh aloud.
 To laugh out of the other corner of the mouth or To laugh out of the other side of the mouth, to weep or cry; to feel regret, vexation, or disappointment after hilarity or exaltation. [Slang]