Negate vs Antonym - What's the difference?

As a verb negate

is to deny the existence, evidence, or truth of; to contradict.

a word which has the opposite meaning of another, although not necessarily in all its senses.

(negat)

To deny the existence, evidence, or truth of; to contradict.

The investigation tending to negate any supernatural influences.

To nullify or cause to be ineffective.

Progress on the study has been negated by the lack of funds.

To be negative; bring or cause negative results.

a pessimism that always negates

(computing) To perform the NOT operation on.

* * ----

(wikipedia antonym)

(en noun)

(semantics) A word which has the opposite meaning of another, although not necessarily in all its senses.

"rich" is an antonym''' of "poor"; "full" is an '''antonym of "empty" .

* synonym

* autoantonym * antonymic * antonymous * antonymy * binary antonym * complementary antonym * gradable antonym * polar antonym * relational antonym

* (wikipedia) ----