inflatable

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Designed to be filled with air or gas before or during use.
• noun An object or device that can be filled with air or gas, especially.
• noun A small rubber boat or raft filled with air.
• noun A large helium or hot-air balloon constructed so as to resemble a figure or object when inflated.

from The Century Dictionary.

• Capable of inflation; that may be inflated or distended.

from the GNU version of the Collaborative International Dictionary of English.

• adjective That may be inflated.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Able to be inflated or blown up.
• noun nautical A boat or dinghy that may be inflated when needed.
• noun Any other structure, artwork etc. that is inflated.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective designed to be filled with air or gas