erratic

[ ih-rat-ik ]
/ ɪˈræt ɪk /

adjective

deviating from the usual or proper course in conduct or opinion; eccentric; queer: erratic behavior.
having no certain or definite course; wandering; not fixed: erratic winds.
Geology. noting or pertaining to a boulder or the like carried by glacial ice and deposited some distance from its place of origin.
(of a lichen) having no attachment to the surface on which it grows.

noun

an erratic or eccentric person.
Geology. an erratic boulder or the like.

Origin of erratic

1325–75; Middle English < Latin errāticus, equivalent to errāt(us) (past participle of errāre to err) + -icus -ic

OTHER WORDS FROM erratic

WORDS THAT MAY BE CONFUSED WITH erratic

erotic erratic exotic

Example sentences from the Web for erratic

British Dictionary definitions for erratic

erratic
/ (ɪˈrætɪk) /

adjective

irregular in performance, behaviour, or attitude; inconsistent and unpredictable
having no fixed or regular course; wandering

noun

a piece of rock that differs in composition, shape, etc, from the rock surrounding it, having been transported from its place of origin, esp by glacial action
an erratic person or thing

Derived forms of erratic

erratically, adverb

Word Origin for erratic

C14: from Latin errāticus, from errāre to wander, err