ne ‧ ga ‧ tion /nɪˈɡeɪʃ ə n/ BrE AmE noun
[ Word Family: verb : ↑ negate ; noun : ↑ negation ]
1 . [singular, uncountable] when something is made to have no effect or be the opposite of what it should be:
Much of what passes for Christianity is a negation of Christ’s teachings.
2 . [uncountable] when someone says no or disagrees:
He shook his head in silent negation.