Definitions

1. verb

to describe or characterize as being opposite or contrasting

“The novelist antithesized the protagonist’s dark past with his bright future.”

2. verb (rare)

to produce a contrasting effect

“The artist’s bold brushstrokes antithesized the delicate watercolor painting.”

3. noun

a person or thing that is opposite or contrasting

“The politician’s antithesize in the debate was a fierce critic of her policies.”