- most reliable or complete, as of a text, author, criticism, study, or the like: the definitive biography of Andrew Jackson.
- serving to define, fix, or specify definitely: to clarify with a definitive statement.
- having its fixed and final form; providing a solution or final answer; satisfying all criteria: the definitive treatment for an infection; a definitive answer to a dilemma.
- Biology. fully developed or formed; complete.
Origin of definitive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- serving to decide or settle finally; conclusive
- most reliable, complete, or authoritativethe definitive reading of a text
- serving to define or outline
- zoology fully developed; completethe definitive form of a parasite
- (of postage stamps) permanently on sale
- (as noun)a definitive postage stamp
- grammar a word indicating specificity of reference, such as the definite article or a demonstrative adjective or pronoun
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
Word Origin and History for undefinitive
late 14c., from Old French definitif (12c.), from Latin definitivus "explanatory, definitive," from past participle stem of definire (see define). Related: Definitively.
Online Etymology Dictionary, © 2010 Douglas Harper