'bull's eye' definitions:

In target shooting: a score made by hitting the center of the target; "in repeated sets of five shots his numbers of bull's-eyes varied"

The center of a target [syn: bull's eye, bull]

Something that exactly succeeds in achieving its goal; "the new advertising campaign was a bell ringer"; "scored a bull's eye"; "hit the mark"; "the president's speech was a home run" [syn: bell ringer, bull's eye, mark, home run]