looking at, watching, or regarding attentively; watchful.
3.
careful in the observing of a law, custom, religious ritual, or the like.
–noun
4.
an observer of law or rule.
5.
(initial capital letter) Also, Ob⋅ser⋅van⋅tine /ɒbˈzɜrvəntɪn,-ˌtin/Show Spelled Pronunciation[ob-zur-vuhn-tin,-teen]Show IPA.a member of a Franciscan order that observes the strict rule of St. Francis.
Origin: 1425–75; late ME < F, prp. of observer.See observe, -ant