1. three identical copies of a document or form

1. to make three identical copies of something
2. to multiply by three

Examples

• Please fill out the form in triplicates for our records.
• The contract was prepared in triplicates so each party could keep a copy.
• She triplicates all important documents before filing them.
• The secretary triplicates the invoice for accounting purposes.
• The recipe triplicates the original serving size.
• He triplicates his investment every few years.
• The office requires triplicates of all expense reports.