first-line

adjective
\ ˈfərst-ˈlīn How to pronounce first-line (audio) \

Definition of first-line

: being the preferred, standard, or first choice first-line treatment of tuberculosis — compare second-line

First Known Use of first-line

1919, in the meaning defined above

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Time Traveler for first-line

Time Traveler

The first known use of first-line was in 1919

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Dictionary Entries Near first-line

first light

first-line

firstling

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Cite this Entry

“First-line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/first-line. Accessed 23 Sep. 2021.

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More Definitions for first-line

first-line

adjective

English Language Learners Definition of first-line

: used or chosen first
: available to be used immediately

first-line

adjective
\ ˈfərst-ˈlīn How to pronounce first-line (audio) \

Medical Definition of first-line

: being the preferred, standard, or first choice first-line treatment of advanced breast cancer — compare second-line

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