Definition of imperative

• a. - Expressive of command; containing positive command; authoritatively or absolutely directive; commanding; authoritative; as, imperative orders.
• a. - Not to be avoided or evaded; obligatory; binding; compulsory; as, an imperative duty or order.
• a. - Expressive of commund, entreaty, advice, or exhortation; as, the imperative mood.
• n. - The imperative mood; also, a verb in the imperative mood.