on sight

noun

1. 1. something seen; view
   2. a remarkable or spectacular view; spectacle
   3. a thing worth seeing: usually used in pl.: the sights of the city
2. the act of seeing; perception by the eyes
3. a view; look; glimpse
4. any of various devices used to aid the eyes in lining up a gun, optical instrument, etc. on its objective
5. aim or an observation taken with mechanical aid, as on a sextant or gun
6. the faculty or power of seeing; vision; eyesight
7. mental vision or perception
8. range or field of vision
9. mental view; opinion; judgment: a hero in our sight
10. Informal any person or thing of a strikingly unpleasant or unusual appearance
11. Dialectal a large amount; great deal: a sight better than fighting
12. Obsolete insight

transitive verb

1. to observe or examine by taking a sight
2. to catch sight of; see
3. ☆ to bring into the sights of a rifle, etc.; aim at
4. 1. to furnish with sights or a sighting device
   2. to adjust the sights of
5. to aim (a gun, etc.) using the sights

intransitive verb

1. to take aim or an observation with a sight
2. to look carefully in a specified direction: sight along the line

adjective

1. read, done, understood, etc. quickly and easily as soon as seen
2. ☆ due or payable when presented: a sight draft