(rail transport) A railway line used to operate trains on, as opposed to a siding.

Synonym of cash on the barrelhead / Cash that is on hand for any expenses. / Used other than figuratively or idiomatically: see cash, on the line.

(nautical) The waterline at which a vessel floats when at light displacement; the light waterline.

(nautical, orienteering, search and rescue) A firearm designed to shoot a rope across a distance, usually used to pass lines from one ship to another.

(firefighting) A linear area which has been cleared of inflammable material in order to prevent a fire from spreading across it.

(chiefly US, informal) To obtain information about someone or something.

(marketing) The technique of offering goods or services at a range of separated price points so as to give the impression of a hierarchy of quality.

(transitive) To bring into a state of conformity; to make consistent with others.

(medicine) A central venous catheter most often used for the administration of chemotherapy or other medications, as well as for the withdrawal of blood for analysis.

A straight line painted on the side of a road, to indicate that parking is restricted