Opposite means “other." If you’re walking to school and realize you forgot your math homework, turn around and walk in the opposite direction to go back and get it.
You say "yes," but I say "no": we're on opposite sides of the debate. Opposite can also mean "across," as in a house that’s on the opposite side of the street from yours. The word has Latin roots, from op, “in front of,” and ponere, “to put” — think about putting something up against something else. Related words are opponent, "the person you’re up against in a game," and oppose, "to disagree."