Definitions from Wiktionary (pf)

▸ noun:  pff
▸ noun:  Initialism of pilot flying., a pilot currently in control of the flight trajectory of the aircraft, as opposed to pilot monitoring
▸ noun:  (physics) Initialism of peak flow. [The largest measure of air respired from the lungs.]
▸ noun:  Abbreviation of power failure. Displayed by some household appliances after a power outage.
▸ noun:  (linguistics) Initialism of phonological form.
▸ noun:  (psychology) Initialism of psychometric function.
▸ noun:  (basketball) Initialism of personal foul. [(sports) A breach of the rules in certain sports, particularly involving dangerous play.]
▸ noun:  (basketball) Initialism of power forward. [(basketball) A forward who is the taller of the two forward positions, and is often responsible for scoring near the basket, collecting rebounds and blocking shots in defense.]
▸ noun:  (American football, fantasy football) Initialism of points for.
▸ noun:  (US, military, aviation) Initialism of patrol fighter.
▸ noun:  (electronics) Initialism of power factor. [(electrical, engineering) The ratio of the actual power to the apparent power in an alternating current power system; specifically, the cosine of the phase angle between the voltage and the current.]



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