1. To make a set of three identical objects or copies of something: Monica was told to triplicate the financial reports of the company when she prepared them for the Chief Executive Officer.
2. To make threefold by tripling something: Jill explained to the salesperson that she wanted to triplicate the items she was buying because she wanted to share them with her friends Leslie, Tina, and Mia.
3. Etymology: from Latin tripicare, "to triple".

triplicate (TRIP li kit) (s) (noun), triplicates (pl)

Something that has three precise parts to it or which exist in three exact reproductions: When Tim went to the photo shop to have his travel pictures developed, he wanted to have them printed in triplicate so he could place one set in his album and share two copies with his friends Erin and Patrick.

triplicate (TRIP li kuht) (adjective) (not comparable)

Descriptive of anything that has three explicit sections to it or which exist in three word-for-word presentations: Matt instructed his secretary to send triplicate invoices to the contractors who were working on the project.