nisi

adjective

ni·​si ˈnī-ˌsī How to pronounce nisi (audio)
: taking effect at a specified time unless previously modified or avoided by cause shown, further proceedings, or a condition fulfilled
a decree nisi

Word History

Etymology

Latin, unless, from ne- not + si if

First Known Use

1738, in the meaning defined above

Time Traveler
The first known use of nisi was in 1738

Browse Nearby Words

Cite this Entry

“Nisi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nisi. Accessed 14 Feb. 2026.

Legal Definition

nisi

adjective
: taking effect at a later specified time unless previously modified or avoided by cause shown, further proceedings, or a condition fulfilled
an order nisi
compare absolute
Etymology

Latin, unless

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