[ak-wuh-pleyn, ah-kwuh-] 
noun, verb, -planed, -plan⋅ing.| 1. | a board that skims over water when towed at high speed by a motorboat, used to carry a rider in aquatic sports. |
[hahy-druh-pleyn] noun, verb, -planed, -plan⋅ing.| 1. | a seaplane. |
| 2. | an attachment to an airplane enabling it to glide on the water. |
| 3. | a light, high-powered boat, esp. one with hydrofoils or a stepped bottom, designed to plane along the surface of the water at very high speeds. |
| 4. | a horizontal rudder for submerging or elevating a submarine. |
| 5. | to skim over water in the manner of a hydroplane. |
| 6. | to travel in a hydroplane. |
| 7. | Also, aquaplane. (of a vehicular tire or vehicle) to ride on a film of water on a wet surface with a resulting decrease in braking and steering effectiveness. |
| aq·ua·plane (āk'wə-plān', ä'kwə-) n. A board pulled over the water by a motorboat and ridden by a person standing up. intr.v. aq·ua·planed, aq·ua·plan·ing, aq·ua·planes To ride on such a board. [aqua- + plane1.] |
wəˌpleɪn