A system and method for identifying an unknown word's likely definition based upon a common social networking group is presented. A user receives a message and selects an unknown word in the message. In turn, the recipient client identifies a common social networking group between the sending client...http://www.google.com.hk/patents/US7933960?utm_source=gb-gplus-share專利 US7933960 - System and method for solving ambiguous meanings of unknown words used in instant messaging