thir·​ty-thir·​ty ˌthər-tē-ˈthər-tē How to pronounce thirty-thirty (audio)
: a rifle that fires a .30 caliber cartridge having a 30 grain powder charge
usually written .30–30

Word History

First Known Use

1929, in the meaning defined above

Time Traveler
The first known use of thirty-thirty was in 1929

Dictionary Entries Near thirty-thirty

Cite this Entry

“Thirty-thirty.” Dictionary, Merriam-Webster, Accessed 19 May. 2024.

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