Definitions

erratic

[ih-rat-ik] / ɪˈræt ɪk /

ADJECTIVE

unpredictable; wandering

Synonyms

STRONGEST

abnormal arbitrary bizarre capricious eccentric inconsistent irregular mercurial uncertain unreliable unstable unusual volatile wayward weird whimsical

WEAK

aberrant anomalous changeable desultory devious dicey directionless dubious fitful flaky fluctuant idiosyncratic iffy incalculable inconstant meandering nomadic oddball peculiar planetary rambling roving shifting spasmodic strange stray undirected unnatural vagarious variable

Antonyms

STRONGEST

calm common normal reasonable regular sensible stable standard steadfast steady unchanging usual

WEAK

certain consistent definite dependable predictable reliable sure

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

While astronomers and space scientists were initially skeptical about the planet nine theory, there has been mounting evidence thanks to increasingly powerful observations that the orbits of trans-Neptunian objects are indeed erratic.

From Science Daily • Jun. 9, 2026

A logjam of unsold assets has buyout firms eager to list, but mixed debuts and erratic markets keep windows for new issues narrow.

From The Wall Street Journal • Jun. 2, 2026

Both rates rose in the month, and both groups have seen more erratic employment trends this year.

From Barron's • May 22, 2026

The court heard that Parker's behaviour had become "erratic" and he refused repeated attempts by his mother and sister to persuade him to get mental health support.

From BBC • May 22, 2026

How could I leave my loving, erratic, harebrained mother to fend for herself?

From "Twilight" by Stephenie Meyer

Vocabulary lists containing erratic

To Kill a Mockingbird

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List 1

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"To Kill a Mockingbird" by Harper Lee, Chapters 1–6

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