Adjective

(en adjective)

According to norms or rules.

Healthy; not sick or ill.

Pertaining to a school to teach teachers how to teach.

(chemistry) Of, relating to, or being a solution containing one equivalent weight of solute per litre of solution.

(organic chemistry) Describing a straight chain isomer of an aliphatic hydrocarbon, or an aliphatic compound in which a substituent is in the 1- position of such a hydrocarbon.

(physics) (Of a mode in an oscillating system ) In which all parts of an object vibrate at the same frequency; See .

(geometry) Perpendicular to a tangent line or derivative of a surface in Euclidean space.

* The interior normal vector of a ideal perfect sphere will always point toward the center, and the exterior normal vector directly away, and both will always be co-linear with the ray whose' tip ends at the point of intersection, which is the intersection of all three sets of points.

(algebra) (Of a subgroup) whose cosets form a group.

(algebra) (Of a field extension of a field K) which is the splitting field of a family of polynomials in K.

(probability theory, statistics) (Of a distribution) which has a very specific bell curve shape.

(complex analysis) (Of a family of continuous functions) which is pre-compact.

(set theory) (Of a function from the ordinals to the ordinals) which is strictly monotonically increasing and continuous with respect to the order topology.

(linear algebra) (Of a matrix) which commutes with its conjugate transpose.

(functional analysis) (Of a Hilbert space operator) which commutes with its adjoint.

(category theory) (Of an epimorphism) which is the cokernel of some morphism.

(category theory) (Of a monomorphism) which is the kernel of some morphism.

(category theory) (Of a morphism) which is a normal epimorphism or a normal monomorphism.

(category theory) (Of a category) in which every monomorphism is normal.

(Of a real number) whose digits, in any base representation, enjoy a uniform distribution.

(topology) (Of a topology) in which disjoint closed sets can be separated by disjoint neighborhoods.

(rail transport, Of points) in the default position, set for the most frequently used route.

Adjective

(en-adj)

Mutual; shared by more than one.

* , chapter=19

, title= The Mirror and the Lamp , passage=Nothing was too small to receive attention, if a supervising eye could suggest improvements likely to conduce to the common welfare. Mr. Gordon Burnage, for instance, personally visited dust-bins and back premises, accompanied by a sort of village bailiff, going his round like a commanding officer doing billets.}}

Occurring or happening regularly or frequently; usual.

* {{quote-magazine, year=2013, month=May-June, author= Katie L. Burke

, title= In the News , volume=101, issue=3, page=193, magazine=(American Scientist) , passage=Bats host many high-profile viruses that can infect humans, including severe acute respiratory syndrome and Ebola. A recent study explored the ecological variables that may contribute to bats’ propensity to harbor such zoonotic diseases by comparing them with another order of common reservoir hosts: rodents.}}

Found in large numbers or in a large quantity.

* {{quote-magazine, date=2012-03, author=Lee A. Groat, title=Gemstones

, volume=100, issue=2, page=128, magazine=(American Scientist) citation , passage=Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)}}

Simple, ordinary or vulgar.

* Washington Irving

the honest, heart-felt enjoyment of common life

* Shakespeare

This fact was infamous / And ill beseeming any common man, / Much more a knight, a captain and a leader.

* A. Murphy

above the vulgar flight of common souls

*

She was frankly disappointed. For some reason she had thought to discover a burglar of one or another accepted type—either a dashing cracksman in full-blown evening dress, lithe, polished, pantherish, or a common yegg, a red-eyed, unshaven burly brute in the rags and tatters of a tramp.

(grammar) In some languages, particularly Germanic languages, of the gender originating from the coalescence of the masculine and feminine categories of nouns.

Of or pertaining to uncapitalized nouns in English, i.e., common nouns vs. proper nouns.

Vernacular, referring to the name of a kind of plant or animal, i.e., common name vs. scientific name.

(obsolete) Profane; polluted.

* Bible, Acts x. 15

What God hath cleansed, that call not thou common .

(obsolete) Given to lewd habits; prostitute.

* L'Estrange

a dame who herself was common