Definition of late inning in US English:

late inning

noun

  • 1(Frequently in plural) any one of the innings towards the end of a game, especially the seventh or a later inning; also attributive, as "late inning home run", "late inning rally", etc.

  • 2Figurative the closing stages of a process; the last minute.

Origin

Late 19th century; earliest use found in Arizona Weekly Citizen (Tucson).