being out (of the office or home); away on an errand or otherwise not present
只今、担当者は外出中です。ご用件をお預かりしましょうか？
The person in charge is currently out. Shall I take a message?
彼女は会議で外出中のため、後ほど折り返し連絡します。
She is out at a meeting and will call back later.
母は午後から外出中で、夜に戻る予定です。
My mother is out from the afternoon and is expected to return in the evening.
外出中に地震が起きたので、すぐに家族に電話した。
An earthquake occurred while I was out, so I immediately called my family.