First-line

"First-line" in a Sentence (5 examples)

Penicillin is a first-line treatment for bacterial infections, but doesn't work against viruses.

XDR-TB does not respond to two first-line drugs commonly used to treat TB, and it is resistant to at least two second-line drugs. Without treatment, the condition is fatal.

The embankment was the first-line defense against the flood.

first-line manager

Police sergeant is a first-line position.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.