What does "antithesis" mean?

A proposition that is the diametric opposite of some other proposition.

What is a synonym for "antithesis"?

Common synonyms include: antagonism, anteposition, antipathy, antipode, antipodes, antipole.

Pronounced //ænˈtɪ.θə.sɪs//.

//ænˈtɪ.θə.sɪs// noun

noun ·Moderate ·College level

Noun

1
A proposition that is the diametric opposite of some other proposition.
"Unless one final Schlafly paradox gets in the way. Before she died, the First Lady of the Conservative Movement endorsed Trump. That makes sense: Schlafly was a paleoconservative who was worried about immigration. But Trump has turned out to be the most unchivalrous candidate in living memory, the very antithesis of Schlafly’s ideal Christian standard."
2
the juxtaposition of contrasting words or ideas to give a feeling of balance wordnet
3
A device by which two contrasting ideas are juxtaposed in parallel form; a figure of speech arranged in this manner rhetoric
"Antithesis, opposing things to things, Oft from the contrast strength and beauty brings."
4
exact opposite wordnet
5
The second stage of a dialectical process in which the thesis is negated.