There are 2 definitions of Ar in English:

Ar1

Syllabification: Ar

symbol

The chemical element argon.

Definition of Ar in:

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Word of the day inamorata
Pronunciation: inˌaməˈrätə
noun
a person's female lover

There are 2 definitions of Ar in English:

AR2

Syllabification: AR

abbreviation

1 (also A/R) Accounts receivable.
1.1US Arkansas (in official postal use).
1.2Army Regulation.
1.3Autonomous Republic.

Definition of Ar in: