first-string

[ furst-string ]
/ ˈfɜrstˈstrɪŋ /

adjective

composed of regular members, participants, etc. (distinguished from substitute): the first-string team.
foremost; main: the first-string critics.

Origin of first-string

First recorded in 1915–20

OTHER WORDS FROM first-string

first-string·er, noun

Example sentences from the Web for first-string