Definition of "Down" :
noun: (American football) a complete play to advance the football
"You have four downs to gain ten yards."
noun: soft fine feathers
noun: fine soft dense hair (as the fine short hair of cattle or deer or the wool of sheep or the undercoat of certain dogs)
noun: (usually plural) a rolling treeless highland with little soil
noun: English physician who first described Down's syndrome (1828-1896)
verb: improve or perfect by pruning or polishing
verb: bring down or defeat (an opponent)
verb: eat up completely, as with great appetite
"Some people can down a pound of meat in the course of one meal."
verb: drink down entirely
"He downed three martinis before dinner."
verb: cause to come or go down
"The policeman downed the heavily armed suspect."
verb: shoot at and force to come down
adjective: filled with melancholy and despondency
"Downcast after his defeat."
adjective: not functioning (temporarily or permanently)
"We can't work because the computer is down."
adjective: shut
"The shades were down."
adjective: lower than previously
"Prices are down."
adjective: understood perfectly
"Had his algebra problems down."
adjective: being put out by a strikeout
"Two down in the bottom of the ninth."
adjective: extending or moving from a higher to a lower place
"The down staircase."
adjective: becoming progressively lower
"The down trend in the real estate market."
adjective: being or moving lower in position or less in some value
"Lay face down."
adverb: spatially or metaphorically from a higher to a lower level or position
"Don't fall down."
adverb: away from a more central or a more northerly place
"Was sent down to work at the regional office."
adverb: paid in cash at time of purchase
"Put ten dollars down on the necklace."
adverb: in an inactive or inoperative state
"The factory went down during the strike."
adverb: to a lower intensity
"He slowly phased down the light until the stage was completely black."
adverb: from an earlier time
"The story was passed down from father to son."