What does incompatible mean?
Incompatible describes things that cannot comfortably coexist, operate together, or agree with one another. The word is especially common in technology: software, hardware, file formats, and operating systems may be incompatible because they use different standards or require different configurations. It also applies to ideas, evidence, rules, and plans that contradict one another. A person can be incompatible with another person, meaning that their attitudes, habits, or principles do not work well together, although this use may suggest a more personal or permanent conflict. The adjective is usually followed by “with,” as in “incompatible with the existing system.” Its opposite is compatible, meaning able to work or coexist harmoniously. Incompatible is useful because it identifies conflicts that are more serious than minor differences and may require changes, compromise, or separation.
adjectiveIncapable of coexisting or working with something else, especially because of conflicting requirements, characteristics, or principles. It can also mean logically inconsistent or contrary to another belief, rule, or system.
- Unable to exist, operate, or work together because of a fundamental conflict.
- Inconsistent with or contrary to a belief, rule, requirement, or standard.
"The two software programs are incompatible and cannot be installed on the same computer."
"The new operating system is incompatible with older versions of the application."
"Her conclusion was incompatible with the assumptions of the study."
Incompatible ideas can sit in the same room, but they refuse to work together—just like two operating systems designed for different worlds.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does incompatible come from?
The word comes from the Latin prefix com-, meaning “with” or “together,” and the Latin verb pati, meaning “to suffer” or “to endure,” through the adjective compatibles. The negative form was formed by adding the prefix in-, with the sense “not able to be together with.” English borrowed the related form in the 17th century, and the modern electronic use developed as computing systems became widely connected.
Related word forms
How incompatible is actually used
The adjective is commonly followed by “with” when describing a conflict between two people, systems, ideas, or requirements. It is widely used in technical contexts, especially computing, and is normally formal or neutral in tone.
Easily confused with incompatible
No distinct word is commonly confused with this headword; the more frequent comparison is with its opposite, compatible.