(Sussex) the South Downs. / A road for shipping in the English Channel or Straits of Dover, near Deal, employed as a naval rendezvous in time of war. / A surname.

simple past tense and past participle of thumbs-down

(nonstandard) simple past tense and past participle of double down

simple past tense and past participle of down tools

Describing a phased-array radar powerful enough to pick aircraft out of ground clutter from high altitude.

Alternative form of look-down, shoot-down

Alternative form of look-down, shoot-down

(neurology, chiefly US) A genetic disorder caused by the presence of all or part of a third copy of chromosome 21 (a chromosomal excess), whereby the patients bear a certain resemblance to the Mongoloid race, such as a small head and tilted eyelids, and typically have a delay in cognitive ability and physical growth.

Used other than figuratively or idiomatically: see get, down. / (transitive or intransitive) To bring or come down; to descend; to cause to bring or come down. / (transitive) To concentrate; attend.

(nautical) Of a ship: so far distant that only the masts and sails are visible above the horizon.