chat

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To converse in an easy, familiar manner; talk lightly and casually.
• intransitive verb Computers To participate in a synchronous exchange of remarks with one or more people over a computer network.
• noun An informal, light conversation.
• noun Computers A synchronous exchange of remarks over a computer network.
• noun Any of various birds in the families Muscicapidae or Parulidae that have a chattering call, especially the yellow-breasted chat.

from The Century Dictionary.

• To converse in a familiar manner; talk without form or ceremony.
• To talk of; converse about.
• noun A name of several different birds. Any bird of the family Saxicolidœ, as a stonechat, whinchat, or wheatear. There are many species, chiefly African
• noun Free, informal speech; familiar conversation.
• noun Idle talk; chatter.
• noun Synonyms See prattle, n.
• noun A cat. See cat.
• noun A catkin.
• noun A key or samara of the ash or maple.
• noun A small potato of inferior quality.
• noun A small piece of coal.
• noun In mining, a piece of ore with stone adhering to it; in the plural (also singular), ore in this state (usually called in the United States raggings): a middle product made in the concentration of ore, consisting of particles of gangue containing included grains of valuable mineral.
• noun plural The tailings or waste product from the concentration of ore.
• noun A twig; a little stick; a fragment.
• noun A child.
• noun Impudence or impudent talk.
• noun The point or question to be settled.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To talk in a light and familiar manner; to converse without form or ceremony; to gossip.
• transitive verb obsolete To talk of.
• noun Light, familiar talk; conversation; gossip.
• noun (Zoöl.) A bird of the genus Icteria, allied to the warblers, in America. The best known species are the yellow-breasted chat (Icteria viridis), and the long-tailed chat (Icteria longicauda). In Europe the name is given to several birds of the family Saxicolidæ, as the stonechat, and whinchat.
• noun (Zoöl.) See under Bush.
• noun A twig, cone, or little branch. See chit.
• noun (Mining) Small stones with ore.
• noun [Local.] small potatoes, such as are given to swine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun mining, local use Mining waste from lead and zinc mines.
• verb To be engaged in informal conversation.
• verb To talk more than a few words.
• verb To exchange text or voice messages in real time through a computer network, as if having a face-to-face conversation.
• noun uncountable Informal conversation.
• noun A conversation to stop an argument or settle situations.
• noun An exchange of text or voice messages in real time through a computer network, resembling a face-to-face conversation.
• noun Any of various small Old World passerine birds in the subfamily Saxicolini that feed on insects.
• noun UK, slang A louse.
• noun small potatoes, such as are given to swine
• noun Alternative form of chaat.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb talk socially without exchanging too much information
• noun songbirds having a chattering call
• noun an informal conversation
• noun birds having a chattering call