Watching; watchful; observing; having or characterized by good powers of observation, or attention, care, accuracy, etc., in observing: as, an observant mind; a man of observant habits.Attentive; obedient; submissive; ready to obey and serve; hence, obsequious: with to or of before a personal object.Carefully attentive in observing or performing whatever is prescribed or required; strict in observing and practising: with of: as, he was very observant of the rules of his order; observant of forms.Synonyms andWatchful, mindful, heedful, regardful.n. An observer.n. An obsequious or slavish attendant.n. One who is strict in observing or complying with a law, rule, custom, etc.n. [capitalized] Specifically, a member of the more rigorous class of Franciscans which in the fifteenth century became separated from those — the Conventuals — following a milder rule.