[ kroo-shuhl ]
/ ˈkru ʃəl /


involving an extremely important decision or result; decisive; critical: a crucial experiment.
severe; trying.
of the form of a cross; cross-shaped.

Origin of crucial

1700–10; < Latin cruci- (stem of crux) cross + -al1

OTHER WORDS FROM crucial Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for crucial

British Dictionary definitions for crucial

/ (ˈkruːʃəl) /


involving a final or supremely important decision or event; decisive; critical
informal very important
slang very good

Derived forms of crucial

crucially, adverb

Word Origin for crucial

C18: from French, from Latin crux cross
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012