Important, indispensable, crucial.

(set phrase) Time is an essential consideration (in regard to an action or response); haste is necessary.

(dated) An unmarried noblewoman who was the attendant of a queen or princess / The chief bridesmaid at a wedding

A measure of all flows of money into and out of a country including payments for goods and services and capital flows. / The systematic record of such transactions.

(games, probability) A game in which the outcome is at least partly determined by random variables rather than strictly by strategy.

(UK) A building for college or university students to live in.

(politics) A vote of no confidence.

Alternative form of offline

(politics, law) A parliamentary motion representing the lack of confidence of a parliament in the standing government. A passed motion of no confidence usually results in the government's fall.

A method of offset printing that uses photomechanical plates