1. (

• hostility ,
• enmity ,
• antagonism

) a state of deep-seated ill-will ;

2. (

• antagonism

) the relation between opposing principles or forces or factors; "the inherent antagonism of capitalism and socialism" ;

3. (

• antagonism ,

) an actively expressed feeling of dislike and hostility ;

4. (

• antagonism

) (biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure ;