Dictionary.com

SIOP

[ sahy-op ]
/ ˈsaɪ ɒp /
Save This Word!

noun
(formerly) the secret and central U.S. contingency plan for waging a nuclear war with the Soviet Union.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of SIOP

s(ingle)i(ntegrated)o(perations)p(lan)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
FEEDBACK