1Traveling away from one's usual workplace for business purposes — can be domestic or overseas.
来月、大阪へ3日間出張することになった。
I have to go on a three-day business trip to Osaka next month.
出張から戻ったら溜まった仕事を片付けなければならない。
After returning from a business trip, I have to catch up on the backlog of work.
海外出張の際はパスポートを忘れずに。
Don't forget your passport when going on an overseas business trip.
彼は出張が多くて家族と過ごす時間が少ない。
He travels for work so often that he has little time with his family.