Observing closely or suspiciously; scrutinizing. Cf. narrow, adj. 4b.

Characterized by or demonstrating close inspection or investigation; scrutinizing. Now esp. of a look, gaze, etc.: searching, intent.

keen of sight; transferred observant, penetrating.

having wide eyes; having the eyes wide open; gazing intently; (in extended use) surprised, amazed, naive.

having the eyes wide open; staring intently; (of a look) intent.