Adjective

(en-adj)

Tending to excite wonder; surprising, extraordinary.

* 1992 , Hilary Mantel, A Place of Greater Safety , Harper Perennial 2007, p. 278:

He is massively corrupt. It is wonderful how the man's popularity survives.

Surprisingly excellent; very good or admirable, extremely impressive.

They served a wonderful six-course meal.

* {{quote-news

, year=2012 , date=April 29 , author=Nathan Rabin , title=TV: Review: THE SIMPSONS (CLASSIC): “Treehouse of Horror III” (season 4, episode 5; originally aired 10/29/1992) citation , page= , passage=Though they obviously realized that these episodes were part of something wonderful and important and lasting, the writers and producers couldn’t have imagined that 20 years later “Treehouse Of Horror” wouldn’t just survive; it’d thrive as one of the most talked-about and watched episodes of every season of The Simpsons.}}

Adjective

(en adjective)

Well grounded or justifiable, pertinent.

*{{quote-magazine, year=2012, month=March-April

, author=(Jan Sapp) , title=Race Finished , volume=100, issue=2, page=164 , magazine=(American Scientist) citation , passage=Few concepts are as emotionally charged as that of race. The word conjures up a mixture of associations—culture, ethnicity, genetics, subjugation, exclusion and persecution. But is the tragic history of efforts to define groups of people by race really a matter of the misuse of science, the abuse of a valid biological concept?}}

I will believe him as soon as he offers a valid answer.

Acceptable, proper or correct.

A valid format for the date is MM/DD/YY.

Do not drive without a valid license.

Related to the current topic, or presented within context, relevant.

(logic) Of a formula or system: such that it evaluates to true regardless of the input values.

(logic) Of an argument: whose conclusion is always true whenever its premises are true.

An argument is valid if and only if the set consisting of both (1) all of its premises and (2) the contradictory of its conclusion is inconsistent.