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n. pl. tatami or ta·ta·mis
Straw matting used as a floor covering especially in a Japanese house.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n, pl -mi or -mis
(Furniture) a thick rectangular mat of woven straw, used as a standard to measure a Japanese room
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n., pl. -mi, -mis.
a thick, woven straw mat of uniform dimensions used in Japanese houses as a floor covering.
[1895–1900; < Japanese, n. use of v.: to fold up]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.