Definition of "carry-on" []

• Small or compact enough to be carried aboard and stowed on an airplane, train, or bus by a passenger: carry-on luggage. (adjective)
• A carry-on bag, suitcase, or other item. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Weighing only eight ounces, this cute little speaker is light enough to toss in your carry-on and small enough to perch pretty much anywhere."
• "More Airlines Balk at Tax Proposal "Ultra low cost" airlines have sprung up, led by Spirit Airlines Inc., which sells tickets for as little as $9, and makes its money charging passengers for such things as seat assignments and carry-on baggage."
• "On a recent flight, the attendant insisted that I check my carry-on because there was no space left."