genie
n. countable B1 Intermediate US //ˈdʒini// UK //dʒˈiːni// ge·nie
n. a magical spirit from old stories that lives in a lamp or bottle. If you set it free, it usually grants you three wishes.
n. a supernatural spirit from Arabic mythology, often depicted in folklore as being imprisoned in a vessel and bound to serve the person who releases it.
The genie granted him three wishes after he rubbed the lamp.
In the classic fairy tale, the protagonist discovers a dusty lamp containing a powerful genie.
The metaphor of the genie being out of the bottle is frequently used in political discourse to describe a situation where a new development cannot be reversed.
Usage
Often appears in the idiom 'to let the genie out of the bottle', meaning to allow something to happen that cannot be stopped.