Definition of "intercontinental ballistic missile" 
A class of long-range missiles associated especially with carrying nuclear warheads. Abbreviation: ICBM(noun)
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Use "intercontinental ballistic missile" in a sentence
"The following week, after reviewing a variety of options about where and how it should be based, I decided to order deployment of the still-under-development MX Peacekeeper long-range intercontinental ballistic missile ICBM in underground silos at Warren Air Force Base in Wyoming."