What is the meaning of Yat?

ISO 639-3 language code for Yambeta.

A vowel letter of the Cyrillic and Glagolitic alphabet (Cyrillic capital Ѣ, Cyrillic small ѣ, Glagolitic ⱑ), no longer in current use

The Late Proto-Slavic (Common Slavic) vowel that was represented by this letter, usually transcribed as /ě/. This vowel underwent various alterations in the later Slavic dialects and is no longer distinguished (except in Ijekavian).

Alternative spelling of yatt (“woman”).

remembrance, memory

feminine of yan (“one”)

yacht

foreigner

second-person singular imperative of yatmak

squirrel

Introduced in Volapük Nulik.

stick, cane

Source: wiktionary.org