An outcast is someone who has been rejected or excluded from a group or society. The opposite of an outcast is an insider, someone who belongs to a group and is accepted by its members. Another antonym for outcast is a popular person, someone who is well-liked and admired by others. A person who is embraced and celebrated by society can be considered an outcast's opposite. Finally, a respected individual who is well-regarded in their community is another antonym for an outcast. While an outcast may feel isolated and unwanted, the antonyms for this word represent those who thrive on inclusion and acceptance.