Erratic meaning

ĭ-rătĭk
The definition of erratic is something that is not consistent or is lacking in a fixed course.

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 with erratic behavior.

adjective
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4
An erratic person.
noun
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Lacking consistency, regularity, or uniformity.

An erratic heartbeat.

adjective
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3
(geol.) Designating a boulder or rock formation transported some distance from its original source, as by a glacier.
adjective
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2
Deviating from the customary course in conduct or opinion; eccentric.

Erratic behavior.

adjective
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A rock fragment that has been transported by ice to a location other than its place of origin and that may range in size from a pebble to a large boulder.
noun
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2
Having no fixed or regular course; wandering.

The erratic flight of a moth.

adjective
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Deviating from the normal, conventional, or customary course; eccentric; queer.
adjective
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Unsteady, random; prone to unexpected changes; not consistent.

Henry has been getting erratic scores on his tests: 40% last week, but 98% this week.

adjective
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Having no fixed course or purpose; irregular; random; wandering.
adjective
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Deviating from the common course in opinion or conduct; eccentric; odd.

Erratic conduct.

adjective
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(geology) A rock moved from one location to another, usually by a glacier.
noun
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Anything that has erratic characteristics.
noun
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Origin of erratic

  • Middle English erratik from Old French erratique from Latin errāticus from errāre to wander ers- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Old French erratique, from Latin erraticus.

    From Wiktionary