An overbed canopy is a type of bedding accessory that is used to create a canopy-like effect over the bed. It is typically made of fabric and is hung from the ceiling or wall above the bed. The term 'overbed canopy' can also refer to a type of bed frame that has a canopy-like structure built into it. TESTER, in this context, is a person who tests the quality of the product before it is released to the public.