n. The state or quality of being ample in size; extension in space, especially breadth or width; largeness; extent.n. The state of being ample in amount; breadth in a figurative sense; fullness; abundance; copiousness.n. Largeness of mind; extent of mental capacity or of intellectual power; breadth of thought.n. In mathematics: In algebra, a positive real number multiplied by a root of unity. The positive real number is said to be the amplitude of the product. In elliptic integrals, the limit of integration when the integral is expressed in the usual trigonometric form.n. In astronomy, the arc of the horizon intercepted between the east or west point and the center of the sun or of a star at its rising or setting.n. the angle whose tangent is the hyperbolic sine of u.n. In function theory, if x = ξ + in, let the polar coördinates of (ξ, η) be ρ, θ, then any one of the angles θ or θ + 2nπ, where n is any positive or negative integer, may be called the amplitude of x.n. In meteorology, the range or difference between the maximum and minimum values of the temperature, pressure, or other meteorological element within a definite time, such as a day, a month, or a year.