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Definition of other half
1 : a group of people who are not like someone because they are either very rich or very poor
—used in the phrase how the other half livesThey won a million dollars and, for a few years, got to see how the other half lives.
2 chiefly British, old-fashioned + humorous : a person's wife or husband
I don't believe we have anything planned for that night, but let me check with my other half.
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