first-line

adjective
\ˈfərst-ˈlīn \

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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The first known use of first-line was in 1919

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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 \

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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