present participle of double-end

(rail transport) a system of operating trains with a driver at each end of the train for a fast turnaround time.

Third-person singular simple present indicative form of double-end

(rail transport, transitive) To operate a train with a locomotive at each end.

Having two ends. / (rail transport, of a train) Having a locomotive at each end. / (rail transport, of a multiple unit, or diesel or electric locomotive) Having a driving cab at each end.

simple past tense and past participle of double-end

plural of double-ended queue

(computing) An abstract list-type data structure where elements can be added to or removed from the front (head) or the back (tail).

(slang) Synonym of double dildo