The definition of erratic is something that is not consistent or is lacking in a fixed course.adjective
A mental patient who behaves in a wildly unpredictable manner, happy and kind one minute and angry and shouting the next, is an example of someone witherratic behavior.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
- having no fixed course or purpose; irregular; random; wandering
- deviating from the normal, conventional, or customary course; eccentric; queer
- Geol. designating a boulder or rock formation transported some distance from its original source, as by a glacier
Origin: ME erratik < OFr erratique < L erraticus, wandering < pp. of errare: see err
- erratically adverb
Used by arrangement with John Wiley & Sons, Inc.
- Having no fixed or regular course; wandering.
- Lacking consistency, regularity, or uniformity: an erratic heartbeat.
- Deviating from the customary course in conduct or opinion; eccentric: erratic behavior.
Origin: Middle English erratik, from Old French erratique, from Latin errāticus, from errāre, to wander; see ers- in Indo-European roots.
- er·ratˈi·cal·ly adverb
- er·ratˈi·cism noun