all-important adj 1: of the greatest importance; "the all-important subject of disarmament"; "crucial information"; "in chess cool nerves are of the essence" [syn: {all-important(a)}, {all important(p)}, {crucial}, {essential}, {of the essence(p)}]
all-important \all-important\ adj. prenom. 1. of the greatest importance. the all-important subject of disarmament Syn: all important(predicate), crucial, essential, of the essence(predicate). [WordNet 1.5]