Definitions for "back up"
to make a backup{5} of; as, the sysop backed up the purchasing data files every night.
To make a copy of a file, group of files, or the entire contents of a hard disk.
To make a copy of your file or program in case the original is damaged or lost.
to serve as a backup{3} for (another person or persons); as, the patrolmen backed up the detectives as they went inside to make the arrest; the center fielder backed up the shortstop on the play.
A ball a bowler throws which hooks toward the hand that he/she delivers it. For example, a right-hander who hooks the ball to the right.
A bowler's release which hooks towards the hand which released it. For instance, the ball hooks right from a right-handed bowler.
Keywords:  reverse, sheet, revers, print, side
to move in a reverse direction; -- used of vehicles or animals.
Printing on the second side of a page that has been printed on the other side.
To print the reverse side of a sheet after the front side has been printed.
give moral or psychological support, aid, or courage to; "She supported him during the illness"; "Her children always backed her up"
Keywords:  clog, fall, swaps, obstructed, drains
become or cause to become obstructed; "The leaves clog our drains in the Fall"; "The water pipe is backed up"
(1) When bond yields rise and prices fall, the market is said to back up. (2) An investor who swaps out of one security into another of shorter current maturity is said to back up. Source
Keywords:  bully, move, position, down
move backwards from a certain position; "The bully had to back down"
Keywords:  precaution, hang, flight, loose, case
a good idea, in case you loose your DVD or something
secondary hang loop used as precaution in case main loop fails during flight.
Keywords:  spare, alternative
an alternative or a spare
Keywords:  ban, balloon, interest
Balloon interest BAN
to accumulate due to a blockage of flow; as, a traffic backup due to an accident; a sewage backup.
Keywords:  genuine, valid, claims, establish, your
establish as valid or genuine; "Can you back up your claims?"
Keywords:  screwed, section, hold, object, another
To hold one section of an object while another is being screwed into or out of it.
someone who takes the place of another, a substitute.
Keywords:  assist, holding
To assist in holding.