from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. That cannot be interchanged with another
from the GNU version of the Collaborative International Dictionary of English
- adj. not able to be interchanged without changing the truth value.
- adj. Not able to be substituted for each other; -- of objects, such as parts of machinery
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. such that the terms of an expression cannot be interchanged without changing the meaning
Sorry, no etymologies found.