frontline
frontline Lexical Profile
frontline Game Scores & Validity
• adjective
Positioned at or relating to the forefront of an important activity, field, or public service, especially involving direct interaction with the public or immediate crisis response.
"Hospital administrators announced a new support program for frontline healthcare workers."
• noun
The most advanced, active, or important position in a field of endeavor, social movement, or crisis response.
"Paramedics and nurses work on the frontline of emergency medical care every day."
The military line or part of an armed force that is closest to the opposing side.
"Supply trucks struggled to reach the troops stationed along the frontline during the winter storm."
Word Nuance & Usage
In formal style guides, the open compound 'front line' is often preferred for the noun, while the closed form 'frontline' or hyphenated 'front-line' is used as an attributive adjective before a noun.