english
1
general::
Phrase(s): at the latest not beyond the time mentioned. • Please pay this bill in ten days at the latest. • I’ll be home by midnight at the latest.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
No later than. For example, We have to be in New York by Monday at the latest. This idiom was first recorded in 1884.
American Heritage Idioms