I. “+ adjective
Etymology: Middle French & Medieval Latin; Middle French, from Medieval Latin incompatibilis, from Latin in- in- (I) + Medieval Latin compatibilis compatible — more at compatible
1. : incapable of being held by one person at one time — used of offices, dignities, or benefices that would make mutually conflicting demands on a holder
2.
a. : incapable of appearing or of being thought together or of entering into the same system, theory, or practice
incompatible ideas
: incapable of harmonious combination : incongruous
incompatible colors
: incapable of harmonious association or of acting in accord : disagreeing
incompatible persons
b.
(1) of drugs or medicaments : unsuitable for use together because of chemical interaction or antagonistic physiological effects — compare synergistic
(2) of blood or serum : unsuitable for use in a particular transfusion because of the presence of agglutinins against the recipient's red blood cells
c. in logic
(1) of two propositions : not both true — compare stroke 14
(2) of terms : not consistently predicable of the same subject — compare alternative denial
d. of mathematical equations : incapable of being satisfied by the same set of values for the unknowns
e. : incapable of blending into a stable homogeneous mixture — used especially of solids or solutions
ester gum is incompatible with cellulose acetate when formulated into a lacquer — Glossary of Industrial Coating Terms
— compare immiscible
3. obsolete : intolerant
• in·com·pat·i·ble·ness -nə̇s noun -es
• in·compatibly |in+ adverb
II. noun
( -s )
: one that is incompatible — usually used in plural