9. The computer program product of claim 8 wherein the unknown word repository is a sending client unknown word repository that corresponds to the sending client, the method further comprising: in response to determining that the unknown word is not included in the unknown word repository, retrieving a recipient client unknown word repository that corresponds to the recipient client; determining whether the unknown word is included in the recipient client unknown word repository, wherein each unknown word included in the recipient client unknown word repository corresponds to a plurality of recipient client definitions; in response to determining that the unknown word is included in the recipient client unknown word repository, selecting one of the plurality of recipient client definitions that corresponds to the unknown word, wherein the selection is based upon the identified common social networking group; and displaying the selected recipient client definition at the recipient client.
8. A computer program product stored on a computer operable media, the computer operable media containing instructions for execution by a computer, which, when executed by the computer, cause the computer to implement a method of identifying a definition of an unknown word, the method comprising: receiving a message from a sending client at a recipient client; detecting an unknown word selection at the recipient client, wherein the unknown word selection corresponds to an unknown word included in the message, the unknown word having a plurality of definitions; identifying a common social networking group between the sending client and the recipient client by matching a sending client user profile with a recipient client user profile, the sending client user profile corresponding to the sending client and the recipient client user profile corresponding to the recipient client; determining whether the unknown word is included in an unknown word repository, wherein each unknown word in the unknown word repository corresponds to a plurality of definitions; in response to determining that the unknown word is included in the unknown word repository, selecting one of the plurality of definitions included in the unknown word repository that corresponds to the unknown word, wherein the selection is based upon the identified common social networking group; and providing the selected definition to a user at the recipient client.