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Related to stepfamily: blended family
n. pl. step·fam·i·lies
A family with one or more stepchildren.
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 -lies
a family created by a second union in which there are stepchildren or step-parents
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
step•fam•i•ly(ˈstɛpˌfæm ə li, -ˌfæm li)
n., pl. -lies.
a family composed of a parent, a stepparent, and a child or children by a previous marriage.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.