adjective

1. 1. capable of living together harmoniously or getting along well together (with)
   2. in agreement; congruent (with)
2. 1. that can work well together, get along well together, combine well, etc. a compatible couple, compatible colors
   2. that can function or be used together without change or alteration
3. that can be mixed without reacting chemically or interfering with one another's action or state: said of drugs, insecticides, etc.
4. Bot. that can be cross-fertilized or grafted readily
5. Comput. designating or of
   1. computer components, software, etc. that can be used with a specified computer or computer system: often in hyphenated compounds
   2. computers or computer systems that can use the same components, software, etc.

Etymology: ME & ML compatibilis < LL(Ec) compati: see compassion