n. a neutral or uncommitted person (especially in politics)

n. someone who bolted from the Republican Party during the U.S. presidential election of 1884

n. a person of a specified kind (usually with many eccentricities); "a real character"; "a strange character"; "a friendly eccentric"; "the capable type"; "a mental case"

n. a disloyal person who betrays or deserts his cause or religion or political party or friend etc.

n. someone who exhibits great independence in thought and action