of the essence

from WordNet (r) 3.0 (2006)

of the essence
    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)}]