a greeting; a polite salutation (used in formal/polite contexts).
転勤の前に上司にご挨拶に伺います。
I'll go to greet my boss before transferring.
はじめに簡単なご挨拶をさせていただきます。
Let me begin with a brief greeting.
年始に親戚へご挨拶に回った。
I went around to greet relatives at the start of the year.
used sarcastically or jokingly as a retort (e.g., 'nice greeting' used to mock a rude remark).
彼の失礼な一言に対して『ご挨拶ですか』と皮肉を言った。
In response to his rude remark, I sarcastically said, 'Is that your greeting?'
『そんなことを言うなんて…ご挨拶ありがとう』と嫌味を返した。
I replied sarcastically, 'Thanks for that lovely greeting,' after he said that.