A blouse fashioned for wearing outside the waistband of a skirt or slacks.
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.
(Clothing & Fashion) a blouse designed to be worn not tucked into trousers or a skirt but to fit loosely over the waist or hips
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
o•ver•blouse(ˈoʊ vərˌblaʊs, -ˌblaʊz)
a blouse designed to be worn outside the waistband of a skirt or a pair of slacks.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.