The act of modifying or the condition of being modified.
A result of modifying.
A small alteration, adjustment, or limitation.
Biology Any of the changes in an organism caused by environment or activity and not genetically transmissable to offspring.
Linguistics
A change undergone by a word that is borrowed from another language.
A phonological change undergone by a word or morpheme when it is used in a construction, as the change of will to 'll in they'll.
(mŏd'ə-fĭ-kā'shən) 