What is the meaning of Optative?

Expressing a wish or a choice.

Related or pertaining to the optative mood.

A mood of verbs found in some languages (e.g. Sanskrit, Old Prussian, and Ancient Greek, but not English), used to express a wish.

A verb or expression in the optative mood.

feminine singular of optatif

vocative masculine singular of optātīvus

Source: wiktionary.org