better half better half {n.}, {informal} One's marriage partner (mostly said by men about their wives.) "This is my better half, Mary," said Joe. Categories: add yours {informal} {n.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: B Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Post my comment