'Flyboat' definitions:

Definition of 'Flyboat'

From: GCIDE

Flyboat \Fly"boat`\, n. [Fly + boat: cf. D. vlieboot.]
1. (Naut.) A large Dutch coasting vessel. [1913 Webster]
Captain George Weymouth made a voyage of discovery to the northwest with two flyboats. --Purchas. [1913 Webster]
2. A kind of passenger boat formerly used on canals. [1913 Webster]