A carry-on is the small bag you may take into the plane cabin with you. One carry-on each.
The size limits differ by airline, which is the whole business model of some of them. A carry-on and no hold bag is the only way to be sure your luggage arrives when you do.
1nouncarry-onThe small bag you may take into the plane cabin with you.
“The carry-on would not fit the frame at the gate.”
carry-on is a bag.
Also accepted in games: hand luggage, cabin bag
Deverbal from carry on.
Etymology from Wiktionary, CC BY-SA
Practised in Travel & Transport