Meaning of “erratic” in the English Dictionary

"erratic" in British English

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erraticadjective

uk /ɪˈræt.ɪk/ us /ɪˈræt̬.ɪk/
erratically
adverb uk /ɪˈræt.ɪ.kəl.i/ us /ɪˈræt̬.ɪ.kəl.i/

In her study, books were arranged erratically on chairs, tables, and shelves.
The machine is working erratically - there must be a loose connection.

(Definition of “erratic” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"erratic" in American English

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erraticadjective

us /ɪˈræt̬·ɪk/

changing suddenly and unexpectedly:

an erratic schedule

(Definition of “erratic” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"erratic" in Business English

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erraticadjective

uk /ɪˈrætɪk/ us

something that is erratic is not regular, certain, or organized in its movement or behaviour:

The erratic behaviour of the stock market is making investors nervous.
Stocks closed up slightly after an erratic day of trading.
erratically
adverb

The stock market has been behaving erratically.

(Definition of “erratic” from the Cambridge Business English Dictionary © Cambridge University Press)