WordWeb Online

1. An informal farewell remark
   "We all stopped to say ta-ta before her flight left";
   - cheers [Brit, informal], chin-chin [Brit, informal], toodle-oo [informal], toodle-pip [Brit, informal], ta-ra [UK, informal], bye [informal], goodbye, bye-bye [informal], good-bye [N. Amer], good-by [US], farewell, sayonara [US, informal], so long [informal], vale [archaic]

Encyclopedia: Ta-ta