1.
a business trip: a trip made for business purposes
- I went on a business trip to Australia last week.
- She goes on many business trips.
2.
a carry-on bag: a bag that one can carry on the airplane
- Most airlines allow you to have one carry-on bag for free.
- I only took a carry-on bag when I went on my business trip last month.
3.
luggage: bags or suitcases that one takes while traveling
- She had a lot of luggage when she was traveling.
- Don't bring a lot of luggage when you travel on business.
