WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the act of attaching or affixing something
noun.
formation of a word by means of an affix
noun.
the result of adding an affix to a root word
Word Usage
"[...] nonhuman animals may have the capacity to learn surface transformations involved in affixation, but they cannot link them to other aspects of linguistic structure."