Down to the wire
Meaning
Until the very last moment.
Usage
Used when outcomes remain uncertain until the end.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Orig from horse racing finish where wire indicated finish line.
Early 1900s reporters used it to describe photo finishes.