'IRBM' definitions:
Definition of 'IRBM'
From: GCIDE
- ballistic missile \bal*lis"tic mis`sile\, n. A rocket-propelled missile of long range which is guided only during the powered portion of its flight, which usually takes only a small part of the total flight time; -- contrasted with guided missile.
- Note: Ballistic missiles are sometimes referred to by their range, such as an
- intercontinental ballistic missile (ICBM) or an
- intermediate range ballistic missile (IRBM). [PJC]