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WAF, or waf, may refer to:


  • Waf, a software build system written in the Python programming language
  • Web application firewall, a proxy device with protocol awareness of HTTP
  • Web application framework, a software framework that is designed to support the development of dynamic websites, Web applications and Web services



Science and technology[edit]

  • WAF1, a protein implicated in p53 transcriptional regulation
  • Weather and Forecasting, an American Meteorological Society journal
  • Width across flats, the distance between the two flats of a wrench (UK: spanner) or socket
  • Wife acceptance factor (or wife approval factor or wife appeal factor), a colloquialism used in discussions related to hi-fi and home theater equipment, home automation


  • 'With all faults', a phrase used as a disclaimer of any implied warranty of merchantability (often appears in descriptions of second-hand books, cars, knowledge, etc.)