adjective. ['ˌæntəˈθɛtɪkəl'] sharply contrasted in character or purpose.
1. Adjective If you think that helping the environment is antithetical to a career as an engineer, think again.
1. My motivation for being a good drummer was born out of fear, which, in a way, seems so antithetical to what art should be. - Damien Chazelle
