Significant-other meaning

A person having importance in, or influence on, another's life.
noun
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A spouse or long-term sexual or romantic partner.
noun
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(informal) A person with whom one has an important bond of some kind.
noun
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A person with whom one has an intimate, often long-term and usually sexual, relationship.
noun
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The definition of a significant other is a person with whom you are in a romantic relationship.

An example of significant other is your live-in boyfriend of ten years.

noun
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(romantic partner): boyfriend, girlfriend, husband, spouse, wife.
hyponyms
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(informal) One's romantic partner, regardless of marital status or gender.
noun
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