There are 3 definitions of ta in English:

ta1

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Pronunciation: /tɑː
 
/

exclamation

British informal
Thank you: ‘Ta,’ said Willie gratefully

Origin

late 18th century: a child's word.

Definition of ta in:

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal

There are 3 definitions of ta in English:

Ta2

Line breaks: Ta

symbol

The chemical element tantalum.

Definition of ta in:

There are 3 definitions of ta in English:

TA3

Line breaks: TA
Pronunciation: /tiːˈeɪ
 
/

abbreviation

(In the UK) Territorial Army: an officer in TA