WFF may refer to:
- Wallops Flight Facility, a NASA facility
- Well-formed formula, in logic, linguistics, and computer science, a symbol or string of symbols that is generated by the formal grammar of a formal language
- Montreal World Film Festival
- Woodhull Freedom Foundation & Federation, a nonprofit created "to affirm sexual freedom as a fundamental human right"
- World's Funniest Fails, a U.S. TV series
- World Fitness Federation
See also
- WFF 'N PROOF, a game developed to teach principles of logic through well-formed formulas
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