I.
present part of back
II. noun
( -s )
1. : something forming or used to form a back: as
a. : unsquared stone or rubble, brick, hollow tile, or concrete block used at the back of a wall in masonry or such supporting masonry itself
b. : a piece of cloth or other material serving as a foundation or used for stiffening
a leather backing on a cloth belt
c. : a thick layer of wood behind the armor of a warship
d. : the silvering on the back of a mirror
e. : a piece of scenery placed behind an opening (as a door or arch) in a stage setting to prevent the audience from seeing what lies behind it
f. : the metal portion of a dental crown, bridge, or similar structure to which a porcelain or plastic tooth facing is attached
g. : a light-absorbing coating either on the back of a photographic plate or film or between the emulsion and the base reducing interreflections between the surfaces and hence reducing halation
2. backings plural , Scotland : refuse of wool, flax, or cloth
3.
a. : support , aid
his campaign had the solid backing of the party leadership
: the persons or elements providing support or aid
his backing includes all the substantial elements in the community
b. : endorsement especially of a warrant by a magistrate
4. : a secondary line attached to a casting line and wound onto the fishing reel spool before it