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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
gbu-28 is a noun meaning "a 5,000 pound laser-guided bomb that can be programmed to penetrate to a given depth before exploding; used to penetrate hardened underground facilities". It carries one recorded sense.
a 5,000 pound laser-guided bomb that can be programmed to penetrate to a given depth before exploding; used to penetrate hardened underground facilities
Definitions, synonyms and semantic relations for gbu-28 come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.