first-line

[ furst-lahyn ]
/ ˈfɜrstˈlaɪn /

adjective

available for immediate service, especially combat service: first-line troops.
of prime importance or quality.

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disgruntle

Origin of first-line

First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for first-line

British Dictionary definitions for first-line

first-line

adjective

acting or used as a first resortfirst-line treatment; first-line batsmen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012