Marginalize Definition

marginalized, marginalizes, marginalizing
marginalized, marginalizes, marginalizing
To exclude or ignore, esp. by relegating to the periphery of a group or by diverting the public's attention to something else.
Webster's New World
To relegate or confine to a lower or outer limit or edge, as of social standing.
American Heritage
The definition of marginalize is to treat a person or group as unimportant, insignificant or of lower status.
When people who disagree with you are ignored and pushed to the outsides of your group, this is an example of a time when you marginalize those who disagree.