front line

noun

Definition of front line

  1. 1 a :  a military line formed by the most advanced tactical combat units; also :  front 2a(2) b :  an area of potential or actual conflict or struggle

  2. 2 :  the most advanced, responsible, or visible position in a field or activity

Examples of front line in a sentence

  1. These researchers are on the front line of defense against cancer.

  2. She has been working on the front lines to educate the poor.

Circa 1797

First Known Use of front line

circa 1797


FRONT LINE Defined for English Language Learners

front line

noun

Definition of front line for English Language Learners

  • : an area where soldiers are fighting

  • : the most important and active position in a job or field of activity


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