imperative adj.
VERBS be, seem | become | remain It remains imperative that all sides should be involved in the talks. | make sth The collapse of the wall made it imperative to keep the water out by some other means. | consider sth We consider it absolutely imperative to start work immediately.
ADV. absolutely
You can also check other dicts: imperative (English, 中文解释 ), wordnet sense, Collins Definition