- 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.
- an erratic or eccentric person.
- Geology. an erratic boulder or the like.
Origin of erratic
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for erratic
The animation is beautifully rendered and the storytelling top notch even if the pacing is, at times, erratic.This Author Kills More Darlings Than George R.R. Martin
September 24, 2014
Her arms strapped back, Lehmberg tells the officials “this erratic behavior is going to ruin my career.”What the Hell Just Happened in Texas, and Why Was Rick Perry Just Indicted?
August 16, 2014
John McCain was an erratic RINO who turned a hundred years old on the campaign trail.Reanimated and Ready: The Unstoppable Huckenstein
January 31, 2014
His erratic behaviour in handling Russian oil pipelines prompted Moscow to seek alternative routes of supply.Forget Kim Jong Un—China’s New Favorite Dictator Is Belarus’s Aleksandr Lukashenko.
January 28, 2014
The responding officers appear to understand the grief behind his erratic action but still want to take a look around the house.The Bioterrorist Who Loved Mahler
January 25, 2014
He worked in his erratic way all winter, and certainly did have some success.Johnny Bear
E. T. Seton
With them we think of the artificial as the archetype; the earth-born as the erratic exception.Alarms and Discursions
G. K. Chesterton
Calhoun swung it on an erratic course, lest there be opposition.Pariah Planet
Susan, holding on against the erratic swayings of the cart, pretended not to hear.Tales of Unrest
Sam was volatile and elusive; his industry of an erratic kind.Mark Twain, A Biography, 1835-1910, Complete
Albert Bigelow Paine
- irregular in performance, behaviour, or attitude; inconsistent and unpredictable
- having no fixed or regular course; wandering
- 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
Word Origin and History for erratic
late 14c., "wandering, moving," from Old French erratique (13c.) and directly from Latin erraticus "wandering, straying, roving," from erratum "an error, mistake, fault," past participle of errare "to wander, err" (see err). Sense of "irregular, eccentric" is attested by 1841. The noun is from 1620s, of persons; 1849, of boulders. Related: Erratically.