1. a document or manuscript written entirely in the handwriting of the person whose signature it bears
Usage: formal; legal/historical contexts

Examples

• The will was a bolograph, signed and written entirely by the testator.
• Historians authenticated the bolograph by comparing it with other known samples of the author's handwriting.
• A bolograph carries more legal weight than a typed document with a signature.
• The museum displayed a bolograph letter from the 18th-century diplomat.