bullseye

Meanings

1. The centre of a target, inside the inner and magpie.
2. A shot which hits the centre of a target.
3. The two central rings on a dartboard.
4. A hard striped peppermint-flavoured boiled sweet.
5. Thick glass set into the side of a ship to let in light.
6. A hand-cancelled postmark issued by a counter clerk at a post office, typically done on a receipt for proof of mailing.
7. The central part of a crown glass disk, with concentric ripple effect.
8. A convex glass lens which is placed in front of a lamp to concentrate the light so as to make it more conspicuous as a signal; also the lantern itself.
9. A commonly-known reference point used when indicating the location or direction of something.
10. An oculus.
11. A £50 banknote.
12. Any of the first postage stamps produced in Brazil from 1843.

1. A cry when someone hits the bullseye of a target.
2. A response to a totally accurate statement.

Etymology

From bull's + eye. May have come from the practice of English archers shooting an arrow through the eye socket of a bull's skull as a test of skill. The connection to philately comes from the shape of the key plate or vignette.