Meaning of “imperfect” in the English Dictionary

"imperfect" in British English

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imperfectadjective

uk /ɪmˈpɜː.fekt/ us /ɪmˈpɝː.fekt/

imperfect adjective (NOT PERFECT)

C1 damaged, containing problems, or not having something:

We're living in an imperfect world.
I explained as well as I was able, given my own imperfect understanding of the situation.

imperfect adjective (GRAMMAR)

specialized language The imperfect form of a verb describes an action in the past that was continuous or was not completed:

In the sentence "He was hit by a car as he was crossing the road", the verb "cross" is in the imperfect form.

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imperfectly
adverb uk /ɪmˈpɜː.fekt.li/ us /ɪmˈpɝː.fekt.li/

imperfectnoun [ S ]

uk /ɪmˈpɜː.fekt/ us /ɪmˈpɝː.fekt/
the imperfect specialized

in some languages, the form of a verb that is used for an action that has not been completed in the past, used, for example, to refer to an action that was happening when it was suddenly interrupted, or to describe an existing situation at the beginning of a story:

In the sentence "He was hit by a car as he was crossing the road", the verb "cross" is in the imperfect.

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

"imperfect" in American English

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imperfectadjective

us /ɪmˈpɜr·fɪkt/

not perfect or not complete:

Our rule of law is still imperfect, but it’s better than having no laws at all.
imperfection
noun [ C/U ] us /ˌɪm·pərˈfek·ʃən/

[ C ] Investigators suspect the engine broke because of a tiny imperfection in one of the parts.

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

"imperfect" in Business English

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imperfectadjective

uk /ɪmˈpɜːfɪkt/ us

PRODUCTION damaged or not made correctly:

Yolk products are made from the cracked, deformed, or otherwise imperfect eggs that don't make it past quality-control standards.

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