in·com·pat·i·ble / ˌinkəmˈpatəbəl; ˌing-/ • adj. (of two things) so opposed in character as to be incapable of existing together: cleverness and femininity were seen as incompatible. ∎ (of two people) unable to live together harmoniously. ∎ (incompatible with) (of one thing or person) not consistent or able to coexist with (another): long hours are simply incompatible with family life. ∎ (of equipment, machinery, computer programs, etc.) not capable of being used in combination: all four prototype camcorders used special tapes and were incompatible with one another.DERIVATIVES: in·com·pat·i·bil·i·ty / -ˌpatəˈbilitē/ n.in·com·pat·i·bly / -blē/ adv.