Definition of pf:
(n) :
pff
(n) :
Initialism of pilot flying, a pilot currently in control of the flight trajectory of the aircraft, as opposed to pilot monitoring. [(aviation) In a two-pilot flight crew, the pilot currently making tactical decisions to ensure the aircraft keeps to the approved route, handling the primary flight controls (the yoke or sidestick, rudder pedals, and thrust/power/throttle levers), and responsible for the secondary controls such as the flaps and autopilot, typically directing the pilot monitoring to operate them. The PF also directs the PM when to run checklists, responding as appropriate.]
(n) :
(basketball) Initialism of personal foul. [(sports) A breach of the rules in certain sports, particularly involving dangerous play.]
(n) :
(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.]
(n) :
Abbreviation of power failure; displayed by some household appliances after a power outage. [(electricity) An unscheduled or accidental break in the supply of electricity.]
(n) :
(physics) Initialism of peak flow. [The largest measure of air respired from the lungs.]