There are 2 definitions of Kr in English:

Kr1

Syllabification: Kr

symbol

The chemical element krypton.

Definition of Kr in:

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

There are 2 definitions of Kr in English:

KR2

Syllabification: KR

abbreviation

Chess
King’s rook.