Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
paste-up is a noun meaning "a composition of flat objects pasted on a board or other backing". It carries one recorded sense.
a composition of flat objects pasted on a board or other backing
“they showed him a paste-up of the book jacket”
Definitions, synonyms and semantic relations for paste-up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.