incompatible /ˌɪŋkəmˈpætɪbəl/adjective 2noun 2forms 3 adjective2 •Of two or more things: that cannot coexist; not congruous because of differences; unable to function together due to dissimilarities.My phone is incompatible with the latest version of this app. •Incapable of being together without mutual reaction or decomposition, as certain medicines. noun2 •[in the plural] An incompatible substance; one of a group of things that cannot be placed or used together because of a change of chemical composition or opposing medicinal qualities. •A consequent of a contrary.Incompatibles are consequents of contraries. For example, sleeping and waking are contraries, and snoring is associated with sleepers. So snoring and waking are incompatibles. — 2004 formsincompatibles · more incompatible · most incompatible