Meaning of NORMAL in English

NORMAL

I. ˈnȯr-məl adjective

Etymology: Latin normalis, from norma

Date: circa 1696

1. : perpendicular ; especially : perpendicular to a tangent at a point of tangency

2.

a. : according with, constituting, or not deviating from a norm, rule, or principle

b. : conforming to a type, standard, or regular pattern

3. : occurring naturally

normal immunity

4.

a. : of, relating to, or characterized by average intelligence or development

b. : free from mental disorder : sane

5.

a. of a solution : having a concentration of one gram equivalent of solute per liter

b. : containing neither basic hydroxyl nor acid hydrogen

normal silver phosphate

c. : not associated

normal molecules

d. : having a straight-chain structure

normal pentane

normal butyl alcohol

6. of a subgroup : having the property that every coset produced by operating on the left by a given element is equal to the coset produced by operating on the right by the same element

7. : relating to, involving, or being a normal curve or normal distribution

normal approximation to the binomial distribution

8. of a matrix : having the property of commutativity under multiplication by the transpose of the matrix each of whose elements is a conjugate complex number with respect to the corresponding element of the given matrix

Synonyms: see regular

• nor·mal·i·ty nȯr-ˈma-lə-tē noun

• nor·mal·ly ˈnȯr-mə-lē adverb

II. noun

Date: circa 1738

1.

a. : a normal line

b. : the portion of a normal line to a plane curve between the curve and the x-axis

2. : one that is normal

3. : a form or state regarded as the norm : standard

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.