observant
Pronunciation:
/əbˈzɜːvənt//əbˈzɝvənt/adjective
Definitions
Alert and paying close attention; watchful.
Example: The observant police officer noticed that my tax disk was out-of-date.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.
Example: I was normally observant of the local parking restrictions.