Can be filled with air or helium

noun

1. A bag that is filled with heated air or a gas lighter than air so as to rise and float in the atmosphere and that usually carries a suspended load (such as a gondola with passengers)
2. An inflatable bag (as of rubber or plastic) usually used as a toy or for decoration
3. A small bag that can be inflated (as in a bodily cavity) with air or gas

   "More than 700,000 Americans undergo procedures in which clogged arteries are cleared out with a balloon and then propped open with a tiny metal scaffold called a stent."

4. The outline enclosing words spoken or thought by a figure especially in a cartoon

adjective

1. Relating to, resembling, or suggesting a balloon

   "a balloon sleeve"

2. Having or being a final installment that is much larger than preceding ones in a term or installment note

   "a balloon note"

verb

1. To swell or puff out expand

   "ballooned to 200 pounds"

2. To ascend or travel in or as if in a balloon
3. To increase rapidly

   "ballooning prices"

4. Inflate, increase

noun

1. Dilation of an obstructed atherosclerotic artery by the passage of a balloon catheter through the vessel to the area of disease where inflation of the catheter's tip compresses the plaque against the vessel wall

noun

1. A catheter with an inflatable tip which can be expanded (as by air or water) especially to hold the catheter in place or to expand a partly closed or obstructed bodily passage, opening, or vessel (such as a coronary artery)
2. a catheter with an inflatable tip which can be expanded (as by air or water) especially to hold the catheter in place or to expand a partly closed or obstructed bodily passage, opening, or vessel (such as a coronary artery) —called also balloon-tipped catheter

noun

1. A perennial Asian herb (Platycodon grandiflorus) cultivated for its star-shaped flowers which open from buds resembling balloons

noun

1. A flexible low-pressure pneumatic tire with a large cross section designed to provide cushioning

noun

1. A tropical American vine (Cardiospermum halicacabum) of the soapberry family bearing large ornamental pods

noun

1. A final payment that is much larger than any earlier payment made on a debt

   "They agreed to pay $1,000 a year for five years and then make a balloon payment of $50,000 at the end of the term."

noun

1. A small captive balloon used to support wires or nets as protection against air attacks