greeting-n; 2 Senses

Sense Number 1: way to say hello

Commentary: A method of acknowledging somebody or saying hello. An expression of good will on meeting. The phrase "greetings" is itself a greeting.

John gave me his usual chilly greeting.
"Greetings, earthling," said the little green man.
My favorite greeting is "G'day!"
That's not a proper greeting for such an old friend.
He wrote a formal greeting at the top of the letter.
A business greeting should be friendly, but not too friendly.

PropBank: greeting.01
WordNet 2.0 Sense Numbers: 1

Sense Number 2: act of greeting

Commentary: GREETING[+event] The act of giving a salutation. Refers to a specific instance of saying hello.

Since we all took turns hugging each other, our greeting lasted a few minutes.
In return, I sent John a greeting card on his birthday (a card that performs the act of greeting).
The greeting of the guests will occur shortly after they arrive.

PropBank: greeting.01
WordNet 2.0 Sense Numbers: -