bull's eye is a noun meaning "in target shooting: a score made by hitting the center of the target". It carries 3 recorded senses.
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”
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”
trope
Definitions, synonyms and semantic relations for bull's eye come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.