a choice limited to one of two or more possibilities, as of things, propositions, or courses of action, the selection of which precludes any other possibility: You have the alternative of riding or walking.
one of the things, propositions, or courses of action that can be chosen: The alternative to riding is walking.
a possible or remaining course or choice: There was no alternative but to walk.
affording a choice of two or more things, propositions, or courses of action.
(of two things, propositions, or courses) mutually exclusive so that if one is chosen the other must be rejected: The alternative possibilities are neutrality and war.