From Longman Dictionary of Contemporary Englishidiolectid‧i‧o‧lect /ˈɪdiəlekt/ noun [countable, uncountable] technical SLthe way in which a particular person uses language → dialect
Examples from the Corpus
idiolect• Such a personal dialect or variety is usually termed an idiolect.Origin idiolect (1900-2000) idio- “own, personal” (from Greek, from idios; → IDIOT) + -lect (as in dialect) 