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

simple past tense and past participle of double up

(astronomy) Two quasars that form a system, such that they gravitationally interact, or are part of the same cluster of galaxies; a binary quasar.

The situation in which a word or phrase has two different, often opposite, meanings. For example, wicked can mean both "good" and "bad".

plural of double boiler

plural of double quasar

(roofing) Application of asphalt, slate, or wood roofing such that the lapped portion is at least two inches wider than the exposed portion, resulting in two layers of roofing material over the deck.

(Australia) A truck and trailer combination consisting of a prime mover coupled to two trailers.

(sports) A pair of games played one after another between the same teams. / A pair of sporting events, one after the other, at a single venue.