Observant
Full definition of observant
Adjective
observant
- Alert and paying close attention; watchful.The observant police officer noticed that my tax disk was out-of-date.
- Diligently attentive in observing a law, custom, duty or principle; regardful; mindful.I was normally observant of the local parking restrictions.
- Sir K. DigbyWe are told how observant Alexander was of his master Aristotle.