- any aircraft that lands on and takes off from water
WordReference Random House Learner's Dictionary of American English © 2026
sea•plane /ˈsiˌpleɪn/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Aeronauticsan airplane with floats for water takeoffs and landings.
sea•plane
(sē′plān′),USA pronunciation n.
- Aeronauticsan airplane provided with floats for taking off from or landing on water.
- sea + plane1 1910–15
Collins Concise English Dictionary © HarperCollins Publishers::
seaplane /ˈsiːˌpleɪn/ n
'seaplane' also found in these entries (note: many are not synonyms or translations):