1. one of three identical copies of a document

1. existing in three identical copies

1. to make three identical copies of something

Examples

• Please fill out the form in triplicate.
• The contract was signed in triplicate by all parties.
• She kept one copy and filed the other two triplicates.
• The triplicate forms were distributed to three different departments.
• The secretary will triplicate the important documents.
• All invoices must be submitted in triplicate format.
• The triplicate receipt system helps prevent fraud.