Wordnet 3.0
NOUN (1)
1. 
 a composition of flat objects pasted on a board or other backing; 
- Example: "they showed him a paste-up of the book jacket"
The Collaborative International Dictionary of English v.0.48:
paste-up \paste-up\ n.
   A composition of a flat object on a board or other backing;
   as, they showed him a paste-up of the book jacket.
   [WordNet 1.5]
WordNet (r) 3.0 (2006):
paste-up
    n 1: a composition of flat objects pasted on a board or other
         backing; "they showed him a paste-up of the book jacket"