Im-pĕr'a-tive, a.
a. [Lat. imperativus, from imperare, to command; It. & Sp. imperativo, Pr. imperatiu, Fr. impératif.]
Sense 1. Expressive of command; containing positive command; authoritatively or absolutely directive; commanding; authoritative; as, imperative orders.
The suits of kings are imperative. Hall.
Sense 2. Not to be avoided or evaded; obligatory; binding; as, an imperative duty or necessity.
Imperative mode (Gram.), that mode, or form of the verb, which expresses command, entreaty, advice, or exhortation; as, go, write, attend.