breechblock breech • breechcloth · · · Info · Definitions · Synonyms · Characters · · breechblock · · Text Latin · · Script 11 · · Length Definitions · · · (noun) a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing. Synonyms: breech closer. · · Noun Definition 1 Synonyms · · · breech closer · · Synonym 1 Characters · · b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 k latin small letter k U+006B l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072