1. paying close attention especially to details
Similar word(s): attentive
2. quick to notice; showing quick and keen perception
3. (of individuals) adhering strictly to laws and rules and customs
- observant of the speed limit
Similar word(s): lawful
Sentences with observant as an adjective:
- The observant police officer noticed that my tax disk was out-of-date.
- I was normally observant of the local parking restrictions.