A platform at the head of the mainmast on a square-rigged vessel. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "maintop" in a sentence
"Larkyns at the maintop was a good second, while Adams at the mizzen was the last; the officer of the watch, on hearing his hail, reporting "All ready!""
"In the maintop were the first mate and three or four of the crew, and in the foretop were the rest, all bunched together and waiting for instructions."
"The foundation for this opinion is the fact that some days ago a mass of wreckage, such as maintop-sails, rigging, masts, etc., was found in the place where the Hollanders have been."