Meaning

noun a mood (grammatically unmarked) that represents the act or state as an objective fact

adjective relating to the mood of verbs that is used simple in declarative statements

adjective (usually followed by `of') pointing out or revealing clearly

originFrom Middle French indicatif, from Late Latin indicātīvus. By surface analysis, indicate + -ive.

Etymology from Wiktionary, CC BY-SA 3.0