At the eleventh hour means at the very last possible moment. A deal was struck at the eleventh hour.
It is more formal than in the nick of time and suits negotiations and reprieves. The phrase comes from a parable about labourers hired at the last hour of the day.
1phraseat the eleventh hourAt the very last possible moment.
“The strike was called off at the eleventh hour.”
at the eleventh hour is a phrase.
Also accepted in games: in the nick of time
Practised in Idioms