imperfective

adj

1. (not-comparable)Of, relating to or having the properties of the imperfective aspect.

   “In the last chapter, we observed the rise of an imperfective marker in English, the Progressive, as the dominant and surviving member of a wider paradigm of imperfective aspectual functions in Old English, but which were no longer marked in the same way in later stages of the history of English.”

   “The former is the basic imperfective subjunctive, while the latter is prominent or intensified.[…]While the present subjunctive is imperfective in aspect, the perfect subjunctive is imperfective in aspect and spatially proximate.”

   “Consider, then, the result of applying these tense morphemes to a perfective or an imperfective verb.”

noun

1. The imperfective aspect; a verb having this aspect.

   “Examples of past imperfectives are shown in (42).”

   “These putative indeterminate imperfectives are innovative in form precisely because they add a manner meaning to the range of lexical meanings available to Proto-Slavic motion verbs.”

   “Past imperfectives are also unproblematic because imperfectives are mass-like in nature, hence contractible.”