In·com·pat·i·ble a. [It was formerly sometimes written incompetible.]
1. 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.
A strength and obduracy of character incompatible with his meek and innocent nature. --Southey.
2. Chem. Incapable of being together without mutual reaction or decomposition, as certain medicines.
Incompatible terms Logic, terms which can not be combined in thought.
Syn: -- Inconsistent; incongruous; dissimilar; irreconcilable; unsuitable; disagreeing; inharmonious; discordant; repugnant; contradictory. See Inconsistent.