Definition of "affix"

That which is affixed; an appendage.  examples

(linguistic morphology) A bound morpheme added to the word’s stem's end.

(linguistic morphology, broadly) A bound morpheme added to a word’s stem; a prefix, suffix, etc.

(mathematics) The complex number a + b i associated with the point in the Gauss plane with coordinates ( a , b ) .  examples

(decorative art) Any small feature, as a figure, a flower, or the like, added for ornament to a vessel or other utensil, to an architectural feature.  examples

(transitive) To attach.  quotations  examples

(transitive) To subjoin, annex, or add at the close or end; to append to.  examples

(transitive) To fix or fasten figuratively; with on or upon.  quotations  examples