- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for first-string
There was no scrimmage until the first-string men had trotted off the field.
On Friday there was only signal work for the subs, but the first-string players and the second held scrimmage as usual.
Dont, added the coach, fool yourselves with the idea that if you get in trouble Ill put the first-string men in to pull you out.
Hughson and Joe were pitching magnificent ball, but they were the only first-string pitchers that could be absolutely relied on.Baseball Joe on the Giants
The first-string men were given easy practice and faced the second for only ten minutes in scrimmage.