noun

1. an art form in which, variously, small objects, bits of newspaper, cloth, pressed flowers, etc. are pasted together on a surface in incongruous relationship for their symbolic or suggestive effect
2. a composition so made
3. any collection of seemingly unrelated bits and parts, as in a photomontage

Etymology: Fr, a pasting < colle, paste < Gr kolla, glue

transitive verb collaged -·laged′, collaging -·lag′·ing