- an airplane provided with floats for taking off from or landing on water.
Origin of seaplane
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for seaplane
VESSELS MOORED IN HARBOR: NINE BATTLESHIPS; THREE CLASS-B CRUISERS; THREE SEAPLANE TENDERS; SEVENTEEN DESTROYERS.The Forgotten Crimes of Japan's Pearl Harbor Spy, Tadashi Morimura
December 6, 2011
Judging by time, it was probably the seaplane which visited Sheerness.
Through the port came the muttering of a seaplane's engines.
I was up about 2,500 feet, and dropped bombs on the seaplane base.
In fact, I had no conception of the altitude of the seaplane then.
At the same time, the seaplane just then did not seem to be making any headway.
- any aircraft that lands on and takes off from waterAlso called (esp US): hydroplane
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for seaplane
Online Etymology Dictionary, © 2010 Douglas Harper