[uh
b-zur-vuhnt] 
| 1. | quick to notice or perceive; alert. |
| 2. | looking at, watching, or regarding attentively; watchful. |
| 3. | careful in the observing of a law, custom, religious ritual, or the like. |
| 4. | an observer of law or rule. |
| 5. | (initial capital letter) Also, Ob⋅ser⋅van⋅tine [ob-zur-vuhn-tin, -teen] . a member of a Franciscan order that observes the strict rule of St. Francis. |
| unobservant | |
adjective | |
| not consciously observing; "looked through him with blank unseeing eyes" |