[suh-plee-shuh
n] 
| the use in inflection or derivation of an allomorph that is not related in form to the primary allomorph of a morpheme, as the use of better as the comparative of good. |
| sup·ple·tion (sə-plē'shən) n. Linguistics The use of an unrelated form to complete a paradigm, as the past tense went of the verb go, goes, going, gone. [From Latin supplētus, past participle of supplēre, to supply; see supply.] |