KL

Kl is a two-letter combination whose meaning varies with context and capitalization. It appears in language codes, information theory, geography, and measurement, among other areas. Because the same letters can indicate different concepts, clarity depends on how the term is written.

In language codes, kl (all lowercase) is the ISO 639-1 code for Kalaallisut, the Greenlandic language. Kalaallisut is the most widely spoken form of Greenlandic and is an official language of Greenland alongside Danish, written with the Latin alphabet. The code itself is used in linguistic and library contexts to identify Greenlandic text.

In information theory, KL denotes the Kullback–Leibler divergence, a measure of how one probability distribution diverges from a reference distribution. It is widely used in statistics, machine learning, and data analysis to quantify differences between models and observed data.

In geography and common usage, KL is a popular informal abbreviation for Kuala Lumpur, the capital and largest city of Malaysia. The term appears in travel writing, news, and local discourse as a shorthand for the city or its metro area.

In measurement, kiloliter is written as kL (lowercase k, uppercase L) and equals 1,000 liters. The uppercase form KL may appear in typographic contexts or older documents, but the standard SI symbol is kL.

Because capitalization changes meaning, readers should rely on surrounding context to determine whether Kl refers to Kalaallisut, KL divergence, Kuala Lumpur, kiloliter, or another usage.