There are 2 definitions of tn in English:

tn1

Syllabification: tn

abbreviation

1US Ton(s).
1.1Town.
1.2Train.

Definition of tn in:

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Word of the day antebellum
Pronunciation: ˌantēˈbeləm
adjective
occurring or existing before a particular war…

There are 2 definitions of tn in English:

TN2

Syllabification: TN

abbreviation

Tennessee (in official postal use).

Definition of tn in: