1 usual; regular; common; typical
the normal way of doing it, the normal level
2 constituting a standard
if we take this as normal
a being within certain limits of intelligence, educational success or ability, etc.
b conforming to the conventions of one's group
4 (Biology, med) (of laboratory animals) maintained in a natural state for purposes of comparison with animals treated with drugs, etc.
5 (Chem) (of a solution) containing a number of grams equal to the equivalent weight of the solute in each litre of solvent., (Symbol)
6 (Chem) denoting a straight-chain hydrocarbon: a normal alkane. Prefix: n-, e.g. n-octane
7 (Geometry) another word for →
8 the usual, average, or typical state, degree, form, etc.
9 anything that is normal
10 (Geometry) a line or plane perpendicular to another line or plane or to the tangent of a curved line or plane at the point of contact (C16: from Latin normalis conforming to the carpenter's square, from norma norm)
normality (esp. U.S.)
n (Statistics) a symmetrical bell-shaped curve representing the probability density function of a normal distribution. The area of a vertical section of the curve represents the probability that the random variable lies between the values which delimit the section
n (Statistics) a continuous distribution of a random variable with its mean, median, and mode equal, the probability density function of which is given by (exp[(x--μ)2/2σ2]/σsquare root (2π)) where μ is the mean and σ2 the variance, (Also called)
n a square matrix A for which AA* = A*A, where A* is the Hermitian conjugate of A
n (in France, and formerly England, the U.S., and Canada) a school or institution for training teachers
(C19: from French école normale: the first French school so named was intended as a model for similar institutions)
standard normal distribution
n (Statistics) a normal distribution with mean zero and variance 1, with probability density function [exp(--½x2)]/square root 2π