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English definition of “carry-on”

carry-on

adjective [not gradable]  /ˈkær·iˌɔn, ˌɑn/ us  
small enough to be carried onto an aircraft with you: All carry-on luggage must be stowed under the seat in front of you or in one of the overhead compartments.
(Definition of carry-on adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
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