observant

adjective3

1. •
   Alert and paying close attention; watchful.

   • The observant police officer noticed that my tax disk was out-of-date.
2. •
   Diligently attentive in observing a law, custom, duty or principle; regardful; mindful.

   • I was normally observant of the local parking restrictions.
3. •
   Practicing a religion.

   • She is an observant Catholic who goes to church regularly.

noun1

1. •
   A member of a Franciscan order that strictly observes the rules of St. Francis.