defence system defence reaction • defenceless · · · Info · Definitions · Synonyms · Characters · · defence system · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) the weaponry available for the defense of a region. Synonyms: defense system, defence system. · · Noun Definition 1 Synonyms · · · defense system · · Synonym 1 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 m latin small letter m U+006D n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074 y latin small letter y U+0079