The Collaborative International Dictionary of English v.0.48:

Chatty \Chat"ty\, a.
   Given to light, familiar talk; talkative. --Lady M. W.
   Montagu.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Chatty \Chat"ty\, n. [Tamil sh[=a]ti.]
   A porous earthen pot used in India for cooling water, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

chatty
    adj 1: full of trivial conversation; "kept from her housework by
           gabby neighbors" [syn: chatty, gabby, garrulous,
           loquacious, talkative, talky]
    2: prone to friendly informal communication [syn: chatty,
       gossipy, newsy]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "chatty":
   all jaw, candid, chitchatty, colloquial, communicative,
   confabulatory, conversational, cozy, effusive, expansive, familiar,
   flip, fluent, frank, gabby, garrulous, gassy, glib, gossipy,
   gregarious, gushy, interlocutory, intimate, long-winded,
   loose-tongued, loquacious, multiloquent, multiloquious, newsy,
   overtalkative, prolix, smooth, sociable, talkative, talky,
   tete-a-tete, verbose, voluble, windy