Good morning is an example of something you say to someone when you see him for the first time at 9 AM.
- Used as a greeting when meeting somebody for the first time in the morning.
- (by extension, humorous) used to greet someone who has just awakened (irrespective of the time of day).
- (by extension, informal) Said to someone who has come to a belated realization.
- A greeting said when parting from someone in the morning.
(plural good mornings)
An ellipsis for an expression such as “I wish you a good morning.”