Sociology. a person, as a parent or peer, who has great influence on one's behavior and self-esteem.
a spouse or cohabiting lover.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for significant other
US informal a spouse or lover
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
significant other in Culture
A person whose close relationship with an individual affects that individual's behavior and attitudes. A significant other is usually a family member, spouse, child, employer, coworker, friend, or lover, who serves as a role model or whose acceptance and approval is sought.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.