noun-modifying (irregular)
Prenominal use meaning 'first' in sequence, rank, or order. Common in compounds like ファーストクラス (first class) or ファーストインプレッション (first impression).
Traveling first class was a dream.
First impressions are important.
Baseball term for the first base or the player defending it.
He is playing first base.
The first baseman made a nice catch.
He plays first base on the team.
The shortstop quickly threw the ball to first base.