What is the meaning of Jer?

ISO 639-3 language code for Jere.

Short for jerfalcon.

either of the Proto-Slavic lax vowels /ɪ/ (front jer, ь) and /ʊ/ (back jer, ъ), which in Late Common Slavic were reduced in certain positions to ultrashort vowels [ɪ̆] and [ʊ̆] (weak jers) and then eventually lost.

Alternative form of (penis)

Alternative form of (to target, to annoy someone verbally)

second person plural objective caseyou, yourselves

Romanization of 𐌾𐌴𐍂

Latin spelling of жер (jer, land, earth, soil; country; place; distance)

yesterday

Alternative form of ier

second person plural objective caseyou, yourselves

year

that, that one

yer

brambling (Fringilla montifringilla)

because, for (for the reason)

Source: wiktionary.org