- Not compatible; so differing as to be incapable of
harmonious combination or coexistence; inconsistent in thought or
being; irreconcilably disagreeing; as, persons of incompatible tempers;
incompatible colors, desires, ambition. - Incapable of being together without mutual reaction
or decomposition, as certain medicines. - An incompatible substance; esp., in pl., things which
can not be placed or used together because of a change of chemical
composition or of opposing medicinal qualities; as, the incompatibles
of iron.