- noun b4 B4 is the written abbreviation for 'before', mainly used in text messages and e-mails. 3
- abbreviation B4 before 3
- noun Technical meaning of b4 (chat) before. 1
- noun b4 paper size defined by ISO 216 as 250mm × 353mm or 9.8 in × 13.9 in. 0
- preposition b4 (messaging) Abbreviation of before. 0
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