One way to hold this word is to take the two little verbs and tie them into a parcel. Meet and greet is what you do; a meet-and-greet is that doing, turned into a thing you can put on a calendar. Picture the first ten seconds of knowing someone: the hello, the handshake, the name said out loud. Normally those seconds are the doorway into something else, a lesson, a show, a holiday. Here somebody has taken just those seconds and built an event around them, so the doorway is the whole room.
From the word’s history
The source entry says the noun is deverbal from meet and greet, that is, the verb phrase used as a noun. Nothing is added to it; the phrase is simply packed up whole.
來源資料說這個名詞是直接從動詞片語 meet and greet 變來的。它沒有加任何字尾，就是整句話原封不動被當成名詞用。
Wiktionary, "meet-and-greet"
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