Definition.com
An Antagonism is a difference, a limit, in a hegemonic discourse that must be articulated as an antagonism by groups in order to subvert or disarticulate the hegemonic discourse.
Definition.com
Antagonism is the negation of a given order, which is, quite simply, the limit of that order.
Definition.com
Antagonism is a term that functions in place of contradiction in classical marxism which implies a clash between the essential interests of two ontologically fundamental classes.
Definition.com
An Antagonism is a 'natural' relation of subordination articulated as socially constructed relations of oppression and domination.