1. crucial(a = adj.all) important - of extreme importance; vital to the resolution of a crisis; "a crucial moment in his career"; "a crucial election"; "a crucial issue for women"
Antonym: noncrucial
Derived form noun cruciality1
2. crucial(s = adj.all) - having crucial relevance; "crucial to the case"; "relevant testimony"
3. crucial(s = adj.all) all important, all-important, essential, of the essence - of the greatest importance; "the all-important subject of disarmament"; "crucial information"; "in chess cool nerves are of the essence"
Derived form noun cruciality1
1. Having the form of a cross; appertaining to a cross; cruciform; intersecting; as, crucial ligaments; a crucial incision. [1913 Webster]
2. Severe; trying or searching, as if bringing to the cross; decisive; as, a crucial test. [1913 Webster]
crucial, adj.
1 decisive, critical.
2 disp. very important.
Derivative:
cruciality n. (pl. -ies). crucially adv.
Etymology:
F f. L crux crucis cross
N crossing, intersection, interdigitation, decussation, transversion, convolution, level crossing, reticulation, network, inosculation, anastomosis, intertexture, mortise, net, plexus, web, mesh, twill, skein, sleeve, felt, lace, wicker, mat, matting, plait, trellis, wattle, lattice, grating, grille, gridiron, tracery, fretwork, filigree, reticle, tissue, netting, mokes, rivulation, cross, chain, wreath, braid, cat's cradle, knot, entangle, cloth, linen, muslin, cambric, crossing, crossed, matted, v, transverse, cross, cruciform, crucial, retiform, reticular, reticulated, areolar, cancellated, grated, barred, streaked, textile, crossbarred, cruciate, palmiped, secant, web-footed, cross, thwart, athwart, transversely, at grade, crosswise.
N demonstration, proof, rigorous proof, conclusiveness, apodeixis, apodixis, probation, comprobation, logic of facts, experimentum crucis, argument, rigorous establishment, absolute establishment, conviction, cogency, (persuasion), demonstrating, demonstrative, demonstrable, probative, unanswerable, conclusive, apodictic, apodeictic, apodeictical, irresistible, irrefutable, irrefragable, necessary, categorical, decisive, crucial, demonstrated, proven, unconfuted, unanswered, unrefuted, evident, deducible, consequential, consectary, inferential, following, convincing, cogent, persuasive (believable), of course, in consequence, consequently, as a matter of course, necessarily, of necessity, probatum est, there is nothing more to be said, quod est demonstrandum, Q, E, D, it must follow, exitus acta probat.