[f. CHATTY a.1 + -NESS.] The quality of being chatty.

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1876.  Green, Short Hist., i. v. (1882), 47. Tradition told … of his chattiness over the adventures of his life.

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1885.  Bookseller, 3 Sept., 883/2. This learning, chattiness, and usefulness was eventually to be turned to good account.

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