<p><strong>Adjective</strong></p><ul><li>deviating from the recognized or customary character, practice, etc.; irregular; erratic; peculiar; odd: eccentric conduct; an eccentric person.</li><li>Synonyms: bizarre, weird, strange.</li><li>Antonyms: conventional, customary, ordinary, regular, normal.</li><li>Geometry: not having the same center; not concentric: used especially of two circles or spheres, at least one of which contains the centers of both.</li><li>(of an axis, axle, etc.) not situated in the center.</li><li>Machinery: having the axis or support away from the center: an eccentric wheel.</li><li>Astronomy: deviating from a circular form, as an elliptic orbit.</li></ul><p><strong>Noun</strong></p><ul><li>a person who has an unusual, peculiar, or odd personality, set of beliefs, or behavior pattern.</li><li>something that is unusual, peculiar, or odd.</li><li>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.</li></ul>