Ta is defined as a British expression for saying thank you.(interjection)
An example of ta is how one would respond to a friend who brought them a glass of wine.
TA is an abbreviation for Teacher's Assistant.(abbreviation)
An example of a TA is someone who helps a teacher grade papers.
See ta in Webster's New World College Dictionary
Origin: < t(its) and a(ss)
See ta in American Heritage Dictionary 4
Origin: Baby-talk alteration of thank you.
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