This is the 1227th most frequent Japanese word.
みなさん
"みなさん" means "everyone" or "all of you."
Here, 'みなさん' is used as a polite way to address everyone in a group.
みなさん、こんにちは。
Hello, everyone.
In this sentence, 'みなさん' refers to all the people being addressed, indicating they are the subjects of discussion.
みなさんはこの映画を見ましたか？
Has everyone watched this movie?
'みなさん' is addressed as the recipients of the announcement, showing inclusion of everyone in the communication.