significant other


noun

Sociology. a person, as a parent or peer, who has great influence on one's behavior and self-esteem.
a spouse or cohabiting lover.

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British Dictionary definitions for significant other

significant other

noun

US informal a spouse or lover

Cultural definitions for significant other

significant other

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.