airship

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A self-propelled lighter-than-air craft with directional control surfaces. Also called dirigible.

Century Dictionary and Cyclopedia

1. n. A buoyant balloon provided with a motor, propellers, and rudders, so that it can navigate the air under the control of an aëronaut; a dirigible balloon. Such balloons are made in various elongated, more or less cigar-shaped, forms and have successfully traversed long distances under good control. The first notably successful experiments with the dirigible balloon were made by Renard, in France, 1884–85; he attained a velocity of 14 miles an hour and was able (as a rule) to return to his starting-point. In 1900 Count Zeppelin made short voyages over Lake Constance in a dirigible of his own design, which has been remodeled and improved until in 1909 it made voyages of several hundred miles. Other successful experimenters have been Santos-Dumont, whose air-ships (successive models) accomplished notable results in 1900 and 1901, Lebaudy in France, Gross and Parseval in Germany, and Thomas S. Baldwin in the United States.

Wiktionary

1. n. A lighter-than-air aircraft that can be propelled forward through the air as well as steered.
2. n. informal Any aircraft.

GNU Webster's 1913

1. n. a steerable self-propelled light-than-air aircraft.

WordNet 3.0

1. v. transport (cargo) by air
2. n. a steerable self-propelled aircraft