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)

Having no validity, "null and void"

insignificant

* 1924 , Marcel Proust, Within a Budding Grove :

In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.

absent or non-existent

(mathematics) of the null set

(mathematics) of or comprising a value of precisely zero

(genetics, of a mutation) causing a complete loss of gene function, amorphic.