Learner's definition of INCOMPATIBLE
[more incompatible; most incompatible]
: not compatible: such asa : not able to exist together without trouble or conflict: not going together well
b : not able to be used together
incompatible people [=people who do not get along well with each other]
Their personalities were incompatible.
a policy that is incompatible with my beliefs [=that does not agree with my beliefs]