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monomark

(UK, historical) A short alphanumeric sequence used in place of a postal address.

ˈmɑnəˌmɑɹkDocumented since 1920s1920sSilenthistorical156 viewsLast reviewed Jun 29, 2026+ Add a definition
🇬🇧 British & Irish slang
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Born ~1925 · no dated citations yet
1925BornToday, 2026

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UK
#1·Apr 27, 2026UK

(UK, historical) A short alphanumeric sequence used in place of a postal address.

Origin: From . The original company, British Monomarks Ltd, launched its service in 1925. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
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