Adjective

(er)

Experiencing the effect of favourable fortune; having the feeling arising from the consciousness of well-being or of enjoyment; enjoying good of any kind, as peace, tranquillity, comfort; contented; joyous.

* 1769 , Oxford Standard text, , 144, xv,

Happy' is that people, that is in such a case: yea, ' happy is that people, whose God is the LORD.

* 1777 , (Alexander Pope), An Essay on Man in Four Epistles: Argument of Epistle II'', in ''The Poetical Works of Alexander Pope, Esq , Volume III, page 26,

The learn'd is happy' nature to explore, / The fool is ' happy that he knows no more ;

Music makes me feel happy .

Favored by luck or fortune; lucky.

* 1661 , (Robert Boyle), (The Sceptical Chymist) , 2006, Elibron Classics (imprint), page 227,

I may presume that what I have hitherto discoursed will induce you to think, that chymists have been much more happy in finding experiments than the causes of them; or in assigning the principles by which they may best be explained.

Dexterous; ready; apt; felicitous.

* 1761 , (Jonathan Swift), A Complete Collection of Genteel and Ingenious Conversation'': Introduction, in ''The works of Dr Jonathan Swift , Volume VII, page 246,

For instance, one lady can give an an?wer better than a?k a que?tion : one gentleman is happy at a reply ; another excels in a rejoinder : one can revive a langui?hing conver?ation by a ?udden ?urpri?ing ?entence ;.

Content, satisfied (with or to do something); having no objection (to something).

Are you happy to pay me back by the end of the week?

Are you happy with your internet service provider?

(As a suffix to a noun) favouring or inclined to use, as in trigger-happy.

* {{quote-news

, year=2012 , date=August 21 , author=Jason Heller , title=The Darkness: Hot Cakes (Music Review) , work=The Onion AV Club citation , page= , passage=“Baby, I was a loser / Several years on the dole / An Englishman with a very high voice / Doing rock ’n’ roll,” sings falsetto-happy frontman Justin Hawkins at the start of “Every Inch Of You,” Hot Cakes ’ opener.}}

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.