There are 2 definitions of hl in English:

hl1

Syllabification: hl

abbreviation

Hectoliter(s).

Definition of hl in:

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Word of the day glee
Pronunciation: gliː
noun
great delight, especially from one's own good fortune…

There are 2 definitions of hl in English:

HL2

Syllabification: HL

abbreviation

(In the UK) House of Lords.

Definition of hl in: