1. (p. pr. & vb. n.) of Back.

2. (n.) The act of moving backward, or of putting or moving anything backward.

3. (n.) That which is behind, and forms the back of, anything, usually giving strength or stability.

4. (n.) Support or aid given to a person or cause.

5. (n.) The preparation of the back of a book with glue, etc., before putting on the cover.

Brownian movement Smyth sewing abetment about-face about-turn advance advocacy advocate advocating aegis affirmation aid alpenstock angular motion approval approving arm ascending ascent assistance athletic supporter attestation auspices authentication axial motion back back track back trail backbone backflowing backing off backing out backing up backsliding backup backward motion bandeau bearer bearing bearing out bibliofilm bibliopegy binder board binding bipack black-and-white film bolstering book cloth book cover book jacket bookbinding bookcase bra brace bracer bracket brassiere bushing buttress buttressing cane capitalization care career carriage carrier carrying cartridge case casemaking casing-in certification cervix championship charity chassis circumstantiation climbing collating collating mark color film color negative film confirmation cooperation corroboration corroboratory evidence corset countenance course cover crook crutch current deficit financing descending descent disenchantment documentation dope downward motion drift driftage dry plate dust cover dust jacket ebbing emulsion encouragement endorsement favor favorable favoring film financial backing financial support financing flight flip-flop flow flux folding footband fortification forward motion fosterage foundation garment frame fulcrum funding funds gathering girdle gluing-off goodwill grant grubstake guidance guy guywire hard binding headband help infrastructure interest investment jacket jock jockstrap lapse library binding lining lining-up mainstay maintainer maintenance mast mechanical binding microfilm money monochromatic film moral support motion-picture film mount mounting neck negative oblique motion ongoing onrush orthochromatic film pack panchromatic film passage patronage patronization perfect binding photographic paper plastic binding plate plunging printing paper pro progress proof prop proving proving out provision of capital psychological support radial motion random motion ratification recidivation recidivism reclamation reconversion reflowing refluence reflux regress regression rehabilitation reinforce reinforcement reinforcer reinstatement relapse reliance rest resting place restitution restoration retrocession retrogradation retrogression retroversion return returning reversal reverse reversing reversion reverting revulsion rigging right-about right-about-face rising roll rounding run rush saddle stitching seconding security blanket set setting sewing shoulder shroud side sewing sideward motion signature sinking skeleton slipcase slipcover slipping back smashing soaring soft binding sound film sound track