back someone up
To confirm what someone says; support what someone does: If you want to go in to complain, I’ll back you up (1860s+ British)
To be someone’s substitute; be in reserve: We’ve got three other drivers to back him up (1950s+)
To play behind a fielder to retrieve balls that might be missed (1940s+ Baseball)
to shift the carriage or typing element of a typewriter one space backward by depressing a special key. Computers. to move the cursor, printhead, etc., toward the beginning of the data. the space made by backspacing. Also called backspacer, backspace key. the labeled key on a typewriter or computer keyboard used for backspacing. verb to […]
reverse rotation of a ball causing it to bounce or roll backward or stop short. noun (sport) a backward spinning motion imparted to a ball to reduce its speed at impact, as by hitting it with a downward or undercutting motion Compare topspin
paneling, as that attached to the back of a stovetop or to the wall behind a kitchen countertop, to protect against splashed liquids.
a knot for finishing a rope end neatly, beginning with a crown and proceeding in a series of tucks, each strand over the first adjoining strand and under the next, the strands being split in half at each tuck. to make a backsplice in (a rope end).