adj. & n.
1. conforming to a standard; regular, usual, typical.
2 free from mental or emotional disorder.
3 Geom. (of a line) at right angles, perpendicular.
4 Chem. (of a solution) containing one gram-equivalent of solute per litre.
1. a the normal value of a temperature etc., esp. blood-heat. b the usual state, level, etc.
2 Geom. a line at right angles.
Phrases and idioms:
normal distribution Statistics a function that represents the distribution of many random variables as a symmetrical bell-shaped graph. normal school (in the US, France, etc.) a school or college for training teachers.
normalcy n. esp. US. normality n.
Etymology: F normal or L normalis (as NORM)