In American football, a down is a play. A team has four plays to advance the ball 10 yards. If they are able to advance the ball 10 yards, they are given another four plays to get another 10 yards. If they are not able to advance the ball 10 yards in four plays, the other team gains possession of the ball. When you hear the term 'first down' that means the upcoming play is the first play in the series of four the team has to advance the ball 10 yards. 'Second down' is the second play in the series of four, 'third down' is the third play in the series of four, and 'fourth down' is the fourth play in the series of four.
No, Up does not mean down. In fact, "down" is the antonym of "up"!
Please clarify what is step down mean ? or did you mean bow down?
Down These Mean Streets was created in 1967.
falls down or breaks down
You probably mean down, but down is not a feather, it is down.
It means to back down or calm down
Probably; I am not sure what you mean. Perhaps you mean "I sit down".
Spelled-down, which should be hyphenated would mean defeated in a Spelling Bee. The phrase is rarely used at present. Down spelled down, that can mean anything, perhaps a novel title. ( often novel titles are indeed novel, and are difficult to figure out!)
Do you mean "down the concentration gradient"?
What do you mean by come down?
If you mean then it could be something like: I'll walk down the aisle of the church. If you mean ill, then it could be something: The bride was feeling ill as she walked down the aisle.
I think you mean slow down and speed up. slow down =slow, speed up=fast