standard vs definitive

standard is a noun but definitive is not a noun.

Word	Noun	Adjective	Verb	Adverb
standard	Yes	Yes	No	No
definitive	No	Yes	No	No

standard (noun)	definitive (noun)
any distinctive flag
an upright pole or beam (especially one used as a support)
the ideal in terms of which something can be judged
a basis for comparison; a reference point against which other things can be evaluated
the value behind the money in a monetary system
a board measure = 1980 board feet

standard (adjective)	definitive (adjective)
established or well-known or widely recognized as a model of authority or excellence	supplying or being a final or conclusive settlement
conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind	clearly defined or formulated
conforming to the established language usage of educated native speakers	of recognized authority or excellence
commonly used or supplied
regularly and widely used or sold