• each of a pair of globular organs of sight in the head of humans and vertebrate animals

Synonyms: organ of sight, eyeball

• a thing resembling an eye in appearance, shape, or relative position

• the small hole in a needle through which the thread is passed

Synonyms: hole, opening, aperture, eyelet, gap, slit, slot, crevice, chink, crack, perforation, interstice

• the source of a spring or river

Synonyms: spring, origin, head, well head, headspring, headwater(s)

• look at closely or with interest

Synonyms: look at, see, observe, view, gaze at, gaze upon, stare at, scan, regard, contemplate, survey, inspect, examine, scrutinize, study, consider, glance at, take a glance at, ogle, leer at, stare at, gaze at, make eyes at, make sheep's eyes at