deviating from the recognized or customary character, practice, etc.; irregular; erratic; peculiar; odd

eccentric conduct; an eccentric person.

Geometry . not having the same center; not concentric

used esp. of two circles or spheres at least one of which contains the centers of both.

(of an axis, axle, etc.) not situated in the center.

Machinery . having the axis or support away from the center

an eccentric wheel.

Astronomy . deviating from a circular form, as an elliptic orbit.

a person who has an unusual, peculiar, or odd personality, set of beliefs, or behavior pattern.

something that is unusual, peculiar, or odd.

Machinery . a device for converting circular motion into rectilinear motion, consisting of a disk fixed somewhat off-center to a revolving shaft, and working freely in a surrounding collar (eccentric strap), to which a rod (eccentric rod) is attached.

adjective

boring , common , dull , normal , ordinary , plain , regular , standard , unexciting , usual

noun

normal , standard

adjective

aberrant , abnormal , anomalous , beat * , bent * , bizarre , capricious , characteristic , cockeyed , crazy , curious , droll , erratic , far out , flaky , freak , freakish , funky * , funny , idiosyncratic , irregular , kooky , nutty , odd , oddball , offbeat , off-center , off the wall , out in left field , outlandish , peculiar , quaint , queer , quirky , quizzical , singular , strange , uncommon , unconventional , unnatural , way out , weird , whimsical , wild , cranky , unusual , atypical , cantankerous , crotchety , fantastic

noun

beatnik , character , freak , hippie , kook , loner , maverick , nonconformist , nut * , oddball , oddity , odd person , original , queer duck , rare bird * , three-dollar bill , weirdo , crazy , lunatic , aberrance , aberrancy , aberrant , aberration , abnormal , anomalous , bizarre , bohemian , capricious , crackpot , deviant , dotty , eccentricity , erratic , flaky , idiosyncrasy , irregular , kooky , odd , off , offbeat , peculiar , peculiarity , queer , quiddity , quirk , quizzical , screwball , singular , strange , unconventional , unusual , weird , whimsical , whimsy