To let water or other fluid, or light, etc., out of, into, or through something, by an accidental or unintentional aperture, or through permeable material: as, the eask leaks; the ship is leaking; the roof leaks.To ooze or pass, as water or other fluid, or anything that can flow, as grain, through an aperture.To void water or urine.To let out or in (especially some fluid) by an accidental aperture: as, the pipe leaks gas; the roof leaks rain; the camera leaks light.To make leaky.Leaky.n. An aperture by which anything that can flow, especially water or other fluid, passes out of, into, or through anything intended to contain, exclude, or restrain it; a crack, crevice, fissure, or hole that permits the passage of anything intended to be shut in or out: as, a leak in a cask, ship, dam, or dike; to stop or plug a leak.n. The oozing or passing of a fluid, etc., into, out of, or through anything by an accidental or unintentional aperture or through a permeable medium; leakage.n. A gutter.