noun
GrammarThe aspect, or kind of action, described by a verb (as perfect, imperfect, etc.); the lexical class to which a verb belongs by virtue of the type of process, state, etc., that it denotes.
Origin
Late 19th century. From German Aktionsart, literally ‘kind of action’ from Aktions-, combining form of Aktion action + Art kind, sort.
Are You Learning English? Here Are Our Top English Tips