noun
- thick, stiff paper material made from layers of paper pulp, used for making boxes and packaging
adjective
- made of cardboard
- lacking substance or depth; artificial or unconvincing
Usage: informal
Examples
- The package was shipped in a sturdy cardboard box.
- She cut out shapes from cardboard for the school project.
- The moving company provided cardboard containers for packing.
- He made a cardboard robot costume for Halloween.
- The actor’s performance felt cardboard and unconvincing.
- The cardboard cutout of the celebrity stood in the lobby.
- Recycle all cardboard materials in the blue bin.