1. the one Supreme Being, the creator and ruler of the universe.
2. the Supreme Being considered with reference to a particular attribute: the God of Islam.
3. (lowercase) one of several deities, esp. a male deity, presiding over some portion of worldly affairs.
4. (often lowercase) a supreme being according to some particular conception: the god of mercy.
5. Christian Science. the Supreme Being, understood as Life, Truth, Love, Mind, Soul, Spirit, Principle.
6. (lowercase) an image of a deity; an idol.
7. (lowercase) any deified person or object.
8. (often lowercase) Gods, Theater. a. the upper balcony in a theater.
b. the spectators in this part of the balcony.

–verb (used with object) 9. (lowercase) to regard or treat as a god; deify; idolize.
–interjection 10. (used to express disappointment, disbelief, weariness, frustration, annoyance, or the like): God, do we have to listen to this nonsense?