say it: im-PUR-fikt
imperfect is an adjective and noun meaning "not perfect; defective or inadequate". It carries 3 recorded senses.
a tense of verbs used in describing action that is on-going
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for imperfect come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.