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crux definition

crux (kruks; also kro̵oks)

noun pl. cruxes crux′es or cruces cru′·ces′ (kro̵̅o̅′sēz′)

  1. Heraldry a cross
  2. a difficult problem; puzzling thing
  3. the essential or deciding point
  4. a small S constellation near the celestial pole containing the Coalsack; the Southern Cross; the Cross

Etymology: L, cross

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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