1. a stiff cardboard made by pasting together layers of paper
2. a playing card
Usage: informal; dated

1. made of pasteboard; flimsy or insubstantial

Examples

• The children made a castle out of pasteboard boxes.
• She cut shapes from pasteboard for the art project.
• The old magician shuffled his worn pasteboards expertly.
• They built a pasteboard model of the building.
• The pasteboard walls of the temporary office were thin.
• He created a pasteboard sign for the school play.
• The pasteboard backing gave the picture frame structure.