Covered with a grid of lines.

(idiomatic) As part of or while performing official duties, usually of the military or police personnel, or of government officials.

plural of chorus line

plural of Kerley line

A sign seen on chest radiographs with interstitial pulmonary edema. They are thin linear pulmonary opacities caused by fluid or cellular infiltration into the interstitium of the lungs.

plural of life-line

Alternative spelling of line dance

plural of line-dance

plural of life line

Alternative spelling of lifeline