incompatible

Universal Words adjective 1 ~ (with sth) two actions, ideas, etc. that are incompatible are not acceptable or possible together because of basic differences: The hours of the job are incompatible with family life. * These two objectives are mutually incompatible. 2 two people who are incompatible are very different from each other and so are not able to live or work happily together: She and her husband soon proved to be totally incompatible. 3 ~ (with sth) two things that are incompatible are of different types so that they cannot be used or mixed together: New computer software is often incompatible with older computers. * Those two blood groups are incompatible. OPPCOMPATIBLE incompatibility noun [U,C] (plural incompatibilities)