English Reference

Word

imperfect

Phoneticsim·per·fect, stress on the second syllable

US/ˌɪmˈpɝfɪkt/

UK/ɪmpˈɜːfɛkt/

Definitions

01having flaws

B1 · Intermediate

adj. having some faults, mistakes, or parts that are not quite right.

adj. not perfect; having flaws, defects, or deficiencies.

“The vase was cheaper because it was imperfect and had a small crack.”

“Even an imperfect plan is often better than no plan at all when a crisis requires immediate and decisive action.”

Antonyms

02grammar: continuous past

B2 · Upper Intermediate Technical

adj. describing a verb tense for an action in the past that was not finished or happened many times.

adj. denoting a tense of verbs used to describe a past action that is incomplete, continuous, or habitual.

“In the sentence 'I was walking', the verb is in the imperfect tense.”

“The student struggled to distinguish between the preterite and the imperfect when narrating stories in Spanish.”

Antonyms

perfectperfective

03botany: unisexual

C2 · Proficiency Science Technical

adj. describing a flower that has only male parts or only female parts, but not both.

adj. having either stamens or pistils, but not both; unisexual.

“Corn plants have imperfect flowers because the male and female parts are separate.”

“The botanist explained that imperfect flowers require cross-pollination to produce seeds effectively.”

Synonyms

unisexual

Antonyms

04a flawed item

B2 · Upper Intermediate Countable noun

n. an object that has a small mistake or flaw, often sold at a lower price.

n. an item, typically a manufactured good, that possesses a minor flaw or defect.

“The factory shop sells imperfects at a fifty percent discount.”

“The quality control team sorted the garments into first-quality items and imperfects destined for the outlet store.”

Synonyms

05grammar: the tense

C1 · Advanced Uncountable noun Technical

n. the name of the verb tense used for unfinished past actions.

n. the imperfect tense or aspect itself.

“The teacher asked the class to conjugate the verb in the imperfect.”

“The use of the imperfect in this poem creates a sense of nostalgia by focusing on ongoing past states rather than completed events.”

Usage

Often follows linking verbs like 'be', 'seem', or 'look'.

Etymology

From Middle English imperfit, from Old French imparfit (modern French imparfait), from Latin imperfectus. Spelling modified 15c. to conform Latin etymology. See im- + perfect.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domains

BotanyGrammar

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B1 PreliminaryIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.4.0–5.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 3.0–3.544–71TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.550–784
Frequency
Frequent
Level
B1 · Intermediate
Updated

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