1. The Semitic sound value of Qôp /q/. In Greek this sign (called Qoppa in Greek) probably came to several labial plosives, among them /k_w/ and /k_w_h/. These sounds changed to /p/ and /p_h/ respectively. Therefore, Qoppa was transformed into two letters: Qoppa, which stood for a number only, and Φι (Phi) which stood for the aspirated sound /p_h/ that came to be pronounced /f/ in Modern Greek. The Etruscans used Q only in conjunction with V, symbolizing thus a /k_w/. und V. In most Modern Languages, Q is rather superfluous. Some scholars claim that Q and Phi are unrelated.
2. The abbreviation used by scholars of the New Testament text to describe a hypothetical lost written "Source" (German, Quelle, and hence, Q) behind the surviving written Synoptic Gospels.
3. A character in James Bond movies.
4. A group of characters, as well as a specific member of the Q Continuum, in Star Trek/Star Trek TNG.