Ta Definition
tä
interjection
Used to express thanks.
American Heritage
Thank you.
Webster's New World
(colloquial, chiefly UK, Ireland, Australia and New Zealand) Thanks.
Wiktionary
abbreviation
Teaching assistant.
American Heritage Medicine
symbol
Tantalum.
Webster's New World
Origin of Ta
Baby-talk alteration of thank you
From American Heritage Dictionary of the English Language, 5th Edition