1
- not perfect; faulty不完美的, 有缺陷的：
an imperfect grasp of English.
对英语的掌握不足。
1.1
- not fully formed or done; incomplete不充分的, 不完全的：
imperfect census records
不完整的人口普查记录
smoke due to imperfect combustion.
未充分燃烧引起的烟雾。
2
- Grammar (of a tense) denoting a past action in progress but not completed at the time in question【语法】（时态）未完成时的。
3
- Music (of a cadence) ending on the dominant chord【乐】（终止式）以属音和弦结束。
4
- Law (of a gift, title, etc.) transferred without all the necessary conditions or requirements being met【律】（赠予物、头衔等）未满足必要条件即转让的。
noun
the imperfect
- Grammar the imperfect tense【语法】未完成时态。
派生词
imperfectly
adverb词源
Middle English imparfit， imperfet， from Old French imparfait, from Latin imperfectus, from in- 'not' + perfectus （see PERFECT）. The spelling change in the 16th cent. was due to association with the Latin form.