better half

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Related to other half: How the Other Half Lives, your other half

(one's) better half

One's significant other (typically one's spouse). Oh, there's my better half! Honey, come say hi to some of my work friends! A: "Wait, Jennie is Ken's better half?" B: "Oh yeah, they've been married for years."
See also: better, half

better half

1. Also, better part. The larger amount or majority of something, as in I won't be long; the better half of this job is complete, or I have spent the better part of my life in this city. Sir Philip Sidney used the first term in Arcadia (1580): "I ... shall think the better half of it already achieved." The variant appears in a well-known proverb, discretion is the better part of valor.
2. Also, my better half. One's (my) spouse, as in I'm not sure if we can go; I'll have to check with my better half. Originally this expression meant "a close friend or lover," and by the 16th century it referred to either a wife or lover. Sidney used it in this way, again in Arcadia: "My dear, my better half (said he), I find I must now leave thee." Today it tends to be used lightly for either husband or wife. "Late 1500s"
See also: better, half