imperfect

American  

[im-pur-fikt] / ɪmˈpɜr fɪkt /

adjective

1. relating to or characterized by defects or weaknesses.

   With my imperfect vision I couldn’t make out the street name.

   Synonyms:

   faulty, defective

2. not perfect; lacking completeness.

   Human knowledge on all subjects is imperfect.

   Synonyms:

   immature, underdeveloped, incomplete

   Antonyms:

   complete

3. Grammar. designating a verb aspect, tense, or other verb category used to express an action or state still in process at some point of reference in time, especially in the past.

4. Law. being without legal effect or support; unenforceable.

5. Botany. (of a flower) diclinous.

6. Music. of or relating to the interval of a major or minor third or sixth.

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noun

Grammar.

1. 1. in some languages, a verb aspect, tense, or other verb category used to express an action or state still in process at some point of reference in time, especially in the past.

   2. an instance or form of a specific verb in such an aspect, tense, or construction, such as Latin portābam “I was carrying.”

imperfect British  

/ ɪmˈpɜːfɪkt /

adjective

1. exhibiting or characterized by faults, mistakes, etc; defective

2. not complete or finished; deficient

3. botany

   1. (of flowers) lacking functional stamens or pistils

   2. (of fungi) not undergoing sexual reproduction

4. grammar denoting a tense of verbs used most commonly in describing continuous or repeated past actions or events, as for example was walking as opposed to walked

5. law (of a trust, an obligation, etc) lacking some necessary formality to make effective or binding; incomplete; legally unenforceable See also executory

6. music

   1. (of a cadence) proceeding to the dominant from the tonic, subdominant, or any chord other than the dominant

   2. of or relating to all intervals other than the fourth, fifth, and octave Compare perfect

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noun

1. grammar

   1. the imperfect tense

   2. a verb in this tense

Other Word Forms

• imperfectness
  noun
• imperfectly
  adverb

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Etymology

Origin of imperfect

First recorded in 1300–50; from Latin imperfectus “unfinished”; equivalent to im- ² + perfect; replacing Middle English imparfit, from Middle French imparfait, from Latin, as above

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Explanation

Something imperfect has flaws, errors, or problems. Imperfect is the opposite of perfect. Imperfect comes from the Latin word imperfectus, meaning “incomplete." If you have an imperfect knowledge of French, you might be able to order a coffee in Paris but not chat with the waiter. Something imperfect is unfinished or damaged in some way. Scuffed silver shoes are imperfect. A great baseball player who makes one error is imperfect. Getting 100 on a test is perfect, but getting a 98 is imperfect. If it’s lacking something, it’s imperfect.

Example Sentences

See Examples For:

imperfect

“To the extent that my rhetoric has been imperfect here,” Vance said, “that’s on me.”

From Salon ● Oct. 21, 2026

He said the motion was "imperfect" and he wanted to see it amended.

From BBC ● Oct. 15, 2026

“I don’t have rose-colored glasses about it, it’s imperfect, like anything else. But ultimately, for a couple of hours, it’s a utopia for the girls.”

From Los Angeles Times ● Oct. 8, 2026

The Audi team relies on hotel-provided black curtains, which McNish said are good but imperfect.

From The Wall Street Journal ● Oct. 5, 2026

“A bit on the imperfect side, yes,” said Feral with regret, and they just couldn’t maintain their seriousness in the face of such an understatement.

From "Strange the Dreamer" by Laini Taylor

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Related Words

• immature
• incomplete
• inexact
• rudimentary
• sketchy
• warped

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