guided bomb unit-28 guided • guided missile · · · Info · Definitions · Characters · · guided bomb unit-28 · · Text Common · · Latin · · Scripts 19 · · Length 6 · · Syllables Definitions · · · (noun) 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. Synonyms: Bunker Buster, Guided Bomb Unit-28, GBU-28. · · Noun Definition 1 Characters · · space U+0020 - hyphen-minus U+002D 2 digit two U+0032 8 digit eight U+0038 b latin small letter b U+0062 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 u latin small letter u U+0075