|Origin:||imperativus, from Latin imperatus, past participle of imperare 'to command'|
Related topics: Grammar
extremely important and needing to be done or dealt with immediately:
It is imperative that politicians should be good communicators.
it is imperative (for somebody) to do something
It is imperative to meet face to face with the client.
an imperative verb is one that expresses an order, such as 'stand up'