In scene or costume design (and art in general), an item that is found rather than created and subsequently incorporated into the finished design.

an object that is literally "found" and not manipulated in any way.

Any item found by the artist and presented as a work of art, with little or no alteration.

A natural object incorporated into a work of art.

A natural or manufactured object that is “found” by the artist and displayed as art or combined with other elements in a work of art.

A found object, in an artistic sense, indicates the use of an object which has not been designed for an artistic purpose, but which exists for another purpose already. Found objects may exist either as utilitarian, manufactured items, or things (including, at times, dead bodies) which occur in nature. In both cases the objects are discovered by the artist or musician to be capable of being employed in an artistic way, and are designated as "found" to distinguish them from purposely created items used in the art forms.