IDIOM ►

to hold the line

Meaning 1
The defensive line, usually seven men, tries to stay in its position against the opponent's offensive attack.
Sentence 1
The Los Angeles Rams held the line at the five yard line against the San Francisco Forty-Niner offensive attack.
Meaning 2
to stay and not move
Sentence 2
Hold the line on that offer. We are not going to pay any more.

Derivation

Hold the line is a military term for holding or staying in place under enemy offensive fire.