A noun denoting the action of the verb or verbal root from which it is derived.

plural of action noun

(music) A pianoforte action, used in grand pianos, in which special devices are employed to obtain perfect action of the hammer in striking and leaving the string.

plural of zone of action

(law) countersuit

Abbreviation of nomen actionis.

(sociology) Research where the researcher themselves are an agent of social action.

plural of group action

(obsolete, rare, phrenology) The state or quality in which a person exhibits willingness to act rather than talk.

plural of class action