Definition of "determinative"

This proceeding, though not presenting questions difficult of determination, or points of law that are novel, is unusual in many of its features, and is important as determinative of the disposition and welfare of a number of little children, ignorant of the contest that is being carried on in regard to them.

1905 January 21, Ch. Kent, opinion, New York Foundling Hospital v. Gatti, Arizona [Territorial] Supreme Court, as reported in, 1907, The Lawyers Reports Annotated, new series, volume 7, page 313

It is therefore clear that, even in adoption cases where it might play a more important role, race is not a determinative factor and its importance will depend greatly on the facts.

2001, Michel Bastarache, “Van de Perre v. Edwards”, in CanLii‎

An entity does not automatically conclude that any observed transaction price is determinative of fair value.

2009 July, International Accounting Standards Board, Financial Instruments, page 617