first-line

adj — 3 senses

first-line

adj

1

Of first resort.

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

2

Of prime quality or importance.

3

At the lowermost supervisory level.

first-line manager
Police sergeant is a first-line position.

Related terms: second-line

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.