Normal



conforming to the standard or the common type; usual; not abnormal; regular; natural.
serving to establish a standard.
Psychology.

approximately average in any psychological trait, as intelligence, personality, or emotional adjustment.
free from any mental disorder; sane.

Biology, Medicine/Medical.

free from any infection or other form of disease or malformation, or from experimental therapy or manipulation.
of natural occurrence.

Mathematics.

being at right angles, as a line; perpendicular.
of the nature of or pertaining to a mathematical normal.
(of an orthogonal system of real functions) defined so that the integral of the square of the absolute value of any function is 1.
(of a topological space) having the property that corresponding to every pair of disjoint closed sets are two disjoint open sets, each containing one of the closed sets.
(of a subgroup) having the property that the same set of elements results when all the elements of the subgroup are operated on consistently on the left and consistently on the right by any element of the group; invariant.

Chemistry.

(of a solution) containing one equivalent weight of the constituent in question in one liter of solution.
pertaining to an aliphatic hydrocarbon having a straight unbranched carbon chain, each carbon atom of which is joined to no more than two other carbon atoms.
of or relating to a neutral salt in which any replaceable hydroxyl groups or hydrogen atoms have been replaced by other groups or atoms, as sodium sulfate, Na 2 SO 4 .

the average or mean:
Production may fall below normal.
the standard or type.
Mathematics.

a perpendicular line or plane, especially one perpendicular to a tangent line of a curve, or a tangent plane of a surface, at the point of contact.
the portion of this perpendicular line included between its point of contact with the curve and the x- axis.

a city in central Illinois.
Contemporary Examples

Nor can the sentences of tribal courts be appealed in normal Pakistani courts.
Pakistan Sentences Shakil Afridi to 30 Years, Sends U.S. Clear Signal Ron Moreau, Sami Yousafzai May 23, 2012

This teacher says that the wretched Soviet regime will vanish and life will return to normal.
Inside ‘Maidan’: Sergei Loznitsa on His Ukrainian Uprising Doc and Putin’s ‘Fascist’ Regime Richard Porton May 23, 2014

He realized that these were abnormal times and people who followed the normal rules were at risk.
Beck’s Lessons for Liberals Michael Tomasky June 28, 2011

In fact, the desire for intimate fraternity was considered more than just normal for a male life; it was believed to be essential.
What Don’t Ask, Don’t Tell Protects Brendan Tapley December 3, 2010

It’s normal, if harsh, for countries to put their own interests before those of refugees.
Between Two Catastrophes: Look at Syria, and Question Everyone’s Stories about 1948 Gershom Gorenberg September 22, 2013

Historical Examples

France was saved because Paris led a normal life in the midst of the whirlwind.
Paris Vistas Helen Davenport Gibbons

Slowly the light in the schooner descended to its normal position.
The Inn at the Red Oak Latta Griswold

And first, of the normal development of the mystic feeling for nature in the case of the individual mind.
Nature Mysticism J. Edward Mercer

Somehow the presence of the beast restored Kay’s mind to normal.
Astounding Stories of Super-Science, November, 1930 Various

I had succeeded in rearing them on a great variety of prey, without paying regard to their normal fare.
More Hunting Wasps J. Henri Fabre

adjective
usual; regular; common; typical: the normal way of doing it, the normal level
constituting a standard: if we take this as normal
(psychol)

being within certain limits of intelligence, educational success or ability, etc
conforming to the conventions of one’s group

(biology, med) (of laboratory animals) maintained in a natural state for purposes of comparison with animals treated with drugs, etc
(chem) (of a solution) containing a number of grams equal to the equivalent weight of the solute in each litre of solvent N
(chem) denoting a straight-chain hydrocarbon: a normal alkane. Prefix: n-, e.g. n-octane
(geometry) another word for perpendicular (sense 1)
noun
the usual, average, or typical state, degree, form, etc
anything that is normal
(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
adj.

c.1500, “typical, common;” 1640s, “standing at a right angle,” from Late Latin normalis “in conformity with rule, normal,” from Latin normalis “made according to a carpenter’s square,” from norma “rule, pattern,” literally “carpenter’s square” (see norm). Meaning “conforming to common standards, usual” is from 1828, but probably older than the record [Barnhart].

As a noun meaning “usual state or condition,” from 1890. Sense of “normal person or thing” is from 1894. Normal school (1834) is from French école normale (1794), a republican foundation. The city of Normal, Illinois, U.S., was named 1857 for the normal school established there.

normal nor·mal (nôr’məl)
adj.

Conforming with, adhering to, or constituting a norm, standard, pattern, level, or type; typical.

Functioning or occurring in a natural way; lacking observable abnormalities or deficiencies.

Occurring naturally and not because of disease, inoculation, or any experimental treatment. Used of immunity.

Of, relating to, or being a solution having one gram equivalent weight of solute per liter of solution.

Of, relating to, or being an aliphatic hydrocarbon having a straight and unbranched chain of carbon atoms.

Of, relating to, or characterized by average intelligence or development.

n.
The usual or the expected state, form, amount, or degree.

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