(American football) The scrimmage line on the offensive side of the football field. / (American football) Offensive line.

(idiomatic) To infer a meaning that is not stated explicitly.

Alternative letter-case form of Mason-Dixon Line

(nautical, military, obsolete) A ship of the line or battleship.

(historical) The boundary line between Pennsylvania and Maryland, as run (1764–1767) by Charles Mason and Jeremiah Dixon, that, before abolition, defined part of the northern boundary of states in which slavery was permitted.

(shipbuilding) a model of a vessel formed of boards which are shaped according to the water lines as shown in the plans and laid upon each other to form a solid model

Alternative form of Mason-Dixon Line

Completely; (of belief or acceptance) naively or unquestioningly.

(intransitive, idiomatic) To formalize an agreement.

(curling) The failure to release a stone before crossing the near hog line.