Definition of collages:
(n) :
A picture made by sticking other pictures onto a surface or juxtaposing them digitally in analogous manner.
(n) :
A composite object or collection (abstract or concrete) created by the assemblage of various media; especially for a work of art such as text, film, etc.
(n) :
(uncountable) The technique or method of producing a work of art of this kind.
(v) :
(transitive) To make into a collage.