This is the 4447th most frequent Japanese word.
外出
"外出" means "going out" or "outing."
The word '外出' here is used as a verb, implying the action of going out for leisure or errands.
天気がいいので、外出しましょう。
Since the weather is nice, let's go out.
In this sentence, '外出' is used as a noun, denoting the state of being outside or away from home.
彼は外出中で、家にはいません。
He is out and not at home.
Here, '外出' is a noun referring to the act or event of going out, used in the context of describing past activities.