plural of running day

(rail transport, usually in the plural) One of the two rails of a railway track with which the wheels of a train make contact. / (horse racing) A fence which marks the inside edge of a racecourse.

plural of running rail

plural of running line

present participle of run lines

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

plural of running shed

(rail transport) A building used for the maintenance and preparation for service of locomotives.

(baseball) The portion of the field between the basepath and the foul ball line in which a batter is allowed to run without causing or receiving interference. Also referred to as runner's lane.

present participle of run amuck