noun
first down
American football term: the first of four downs, or the act of gaining ten yards to earn a new set of downs.
チームはランでファーストダウンを獲得した。
The team got a first down on a run.
ファーストダウンまであと3ヤードだ。
It's third and three to go for a first down.
Variant with interpunct; less common in running text.
Borrowed from English 'first down'.