erratic Definition in the Cambridge English Dictionary
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Definition of “erratic” - English Dictionary

Definition of "erratic" - American English Dictionary

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erraticadjective

 us   /ɪˈræt̬·ɪk/
changingsuddenly and unexpectedly: an erratic ​schedule
(Definition of erratic from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "erratic" - British English Dictionary

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erraticadjective

uk   /ɪˈræt.ɪk/  us   /-ˈræt̬-/
moving or ​behaving in a way that is not ​regular, ​certain, or ​expected: He ​drove in an erratic ​course down the ​road. She can be very erratic; one ​day she is ​friendly and the next she'll ​hardlyspeak to you.
erratically
adverb uk   us   /-ɪ.kəl.i/
In her ​study, ​books were ​arranged erratically on ​chairs, ​tables, and ​shelves. The ​machine is ​working erratically - there must be a ​looseconnection.
(Definition of erratic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "erratic" - Business English Dictionary

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erraticadjective

uk   us   /ɪˈrætɪk/
something that is erratic is not ​regular, ​certain, or ​organized in its ​movement or ​behaviour: The erratic ​behaviour of the ​stockmarket is making ​investors nervous. Stocks ​closed up slightly after an erratic day of ​trading.
erratically
adverb
The ​stockmarket has been ​behaving erratically.
(Definition of erratic from the Cambridge Business English Dictionary © Cambridge University Press)
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