Definitions for the word "normal" from multiple English dictionaries.
1. a.
According to an established norm, rule, or principle; conformed to a type, standard, or regular form; performing the proper functions; not abnormal; regular; natural; analogical.
Source: The 1913 Webster Unabridged Dictionary, 1913
2. a.
According to a square or rule; perpendicular; forming a right angle. Specifically: Of or pertaining to a normal.
Source: The 1913 Webster Unabridged Dictionary, 1913
3. a.
Standard; original; exact; typical.
Source: The 1913 Webster Unabridged Dictionary, 1913
4. a.
Denoting a solution of such strength that every cubic centimeter contains the same number of milligrams of the element in question as the number of its molecular weight.
Source: The 1913 Webster Unabridged Dictionary, 1913
5. a.
Denoting certain hypothetical compounds, as acids from which the real acids are obtained by dehydration; thus, normal sulphuric acid and normal nitric acid are respectively S(OH)6, and N(OH)5.
Source: The 1913 Webster Unabridged Dictionary, 1913
6. a.
Denoting that series of hydrocarbons in which no carbon atom is united with more than two other carbon atoms; as, normal pentane, hexane, etc. Cf. Iso-.
Source: The 1913 Webster Unabridged Dictionary, 1913
7. a.
Any perpendicular.
Source: The 1913 Webster Unabridged Dictionary, 1913
8. a.
A straight line or plane drawn from any point of a curve or surface so as to be perpendicular to the curve or surface at that point.
Source: The 1913 Webster Unabridged Dictionary, 1913
9. adj.
1 conforming to a standard; regular, usual, typical. 2 free from mental or emotional disorder. 3 geom. (of a line) at right angles, perpendicular. n. 1 a normal value of a temperature etc. B usual state, level, etc. 2 line at right angles. normalcy n. Esp. Us. Normality n. [latin normalis: related to *norm]
Source: Oxford English Dictionary, 1884
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