designating or pertaining to a verb mood, as in Greek, that has among its functions the expression of a wish, as Greek íoimen “may we go, we wish we might go.”
–noun
2.
the optative mood.
3.
a verb in the optative mood.
Origin: 1520–30; < LL optātīvus, equiv. to L optāt(us) (ptp. of optāre;see opt, -ate1) + -īvus-ive