ETYM Latin imperativus, from imperare to command; pref. im- in + parare to make ready, prepare: cf. French impératif. Related to Perade, Empire.
1. Requiring attention or action.
2. (Grammar) Relating to verbs in the imperative mood.
Some duty that is essential and urgent.
In grammar, the mood of the verb in a sentence in which a command or request is given (“Take a seat”; “Speak up!”).