1. precious stone (esp. jade)
also formerly read as ごく
2. egg (sometimes esp. as a sushi topping)
occ. ギョク
3. stock or security being traded; product being bought or sold
4. position (in finance, the amount of a security either owned or owed by an investor or dealer)
5. geisha
6. time charge for a geisha
7. king (of the junior player)