(one's) better half

(one's) better half

One's spouse or romantic partner. I'd love to come out with you guys after work, but I'd better check in with my better half to make sure we don't have any plans for this evening. The work retreat is meant to be for couples, so be sure to bring your better half!
See also: better, half
Farlex Dictionary of Idioms.

one's better half

Fig. one's spouse. (Usually refers to a wife.) I think we'd like to come for dinner, but I'll have to ask my better half. I have to go home now to my better half. We are going out tonight.
See also: better, half
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

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
The American Heritage® Dictionary of Idioms by Christine Ammer.

your better half

your husband or wife. humorous
See also: better, half
Farlex Partner Idioms Dictionary

your better/other ˈhalf

(informal, humorous) your wife or husband: I’ll have to ask my better half about that.
See also: better, half, other
Farlex Partner Idioms Dictionary

one’s better half

n. one’s wife, and occasionally, one’s husband. My better half disapproved of the movie.
See also: better, half
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • better half
  • halves
  • one’s better half
  • one's better half
  • so much the better
  • all to the better
  • all the better
  • better half, my
  • (one) (had) better be off
  • make a better fist of (something)