What is the meaning of Kyu?

ISO 639-3 language code for Western Kayah.

A grade or rank in various Japanese activities such as martial arts, flower arranging, and the game of go.

The hiragana syllable きゅ (kyu) or the katakana syllable キュ (kyu) in Hepburn romanization.

the name of the Latin-script letter Q/q, in the Filipino alphabet

Source: wiktionary.org