1. a piece of writing in code or cipher
2. a device or system for creating or decoding secret messages

Examples

• The spy carried a cryptograph containing classified information.
• Ancient cryptographs have puzzled historians for centuries.
• The military used a sophisticated cryptograph to encode battle plans.
• She spent hours trying to decode the mysterious cryptograph.
• The cryptograph machine was essential for wartime communications.
• Archaeologists discovered a Roman cryptograph carved in stone.