Meaning : (mathematics, logic) such that the arguments or roles can be interchanged.
Example :
The arguments of the symmetric relation, `is a sister of,' are interchangeable.
Meaning : Capable of replacing or changing places with something else. Permitting mutual substitution without loss of function or suitability.
Example :
Interchangeable electric outlets.
Interchangeable parts.
Synonyms : exchangeable, similar, standardised, standardized