1. (noun)eccentric, eccentric person, flake, oddball, geek a person with an unusual or odd personality
2. (noun)character, eccentric, type, case 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"
3. (adj)bizarre, eccentric, freakish, freaky, flaky, flakey, gonzo, off-the-wall, outlandish, outre conspicuously or grossly unconventional or unusual
"restaurants of bizarre design--one like a hat, another like a rabbit"; "famed for his eccentric spelling"; "a freakish combination of styles"; "his off-the-wall antics"; "the outlandish clothes of teenagers"; "outre and affected stage antics"
4. (adj)eccentric, nonconcentric not having a common center; not concentric
"eccentric circles"