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mental lexicon

British  

noun

  1. the store of words in a person's mind

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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They exist only in your mental lexicon, and their meaning is determined by the meaning assigned by this lexicon.

From Washington Post

Only through reading—not listening to talk—can a youngster expand his or her mental lexicon enough to allow truly fluid reading, with its rapid line-by-line scanning and its effortless absorption of meaning.

From Salon