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Longman Dictionary of Contemporary English
hand luggage
noun
EXAMPLES FROM CORPUS
▪ I could see her working out how many jars she'd be able to carry in her hand luggage.
▪ I made one good decision: to wear the trainers on the plane, and carry the paperwork in my hand luggage.
▪ Meg succumbed to the biggest smile she had ever seen in her life and surrendered her case and hand luggage with pleasure.
▪ Some can be carried in hand luggage, others must be checked in.
WordNet
hand luggage

n. luggage that is light enough to be carried by hand

Wikipedia
Hand luggage

The term hand luggage or cabin baggage (also commonly referred to as carry-on in North America) refers to the type of luggage that passengers are allowed to carry along in the passenger compartment of a vehicle instead of moving to the cargo compartment. Passengers are allowed to carry a limited number of smaller bags with them in the vehicle and contain valuables and items needed during the journey. There is normally storage space provided for hand luggage, either under seating, or in overhead lockers. Trains usually have luggage racks above the seats and may also (especially in the case of trains travelling longer distances) have luggage space between the backs of seats facing opposite directions, or in extra luggage racks, for example, at the ends of the carriage near the doors.