helicopter

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

• noun An aircraft that derives its lift from blades that rotate about an approximately vertical central axis.
• intransitive & transitive verb To go or transport by helicopter.

from The Century Dictionary.

• noun A flying-machine in which revolving screws or revolving helicoidal surfaces are depended upon to sustain the machine in the air.

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

• noun a heavier-than-air aircraft whose lift is provided by the aerodynamic forces on rotating blades rather than on fixed wings. Contrasted with fixed-wing aircraft.
• intransitive verb to travel in a helicopter.
• transitive verb to transport in a helicopter.

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

• noun An aircraft that is borne along by one or more sets of long rotating blades which allow it to hover, move in any direction including reverse, or land; and having a smaller set of blades on its tail that stabilize the aircraft.
• noun a powered troweling machine with spinning blades used to spread concrete.
• noun a winged fruit of certain trees, such as ash, elm, and maple
• verb transitive To transport by helicopter.
• verb intransitive To travel by helicopter.

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

• noun an aircraft without wings that obtains its lift from the rotation of overhead blades