# PF

> English word · Noun · frequency rank #16,301

## Definitions
1. Initialism of pilot flying, a pilot currently in control of the flight trajectory of the aircraft, as opposed to pilot monitoring.
2. Initialism of peak flow.
3. Abbreviation of power failure; displayed by some household appliances after a power outage.
4. Initialism of phonological form.
5. Initialism of psychometric function.
6. Initialism of personal foul.
7. Initialism of power forward.
8. Initialism of points for.
9. Initialism of patrol fighter.

## Easily confused with
- **PM** (https://plainspell.com/en/vs/pf-vs-pm)
- **PP** (https://plainspell.com/en/vs/pf-vs-pp)
- **PR** (https://plainspell.com/en/vs/pf-vs-pr)
- **pt** (https://plainspell.com/en/vs/pf-vs-pt)
- **PS** (https://plainspell.com/en/vs/pf-vs-ps)
- **po** (https://plainspell.com/en/vs/pf-vs-po)
- **pi** (https://plainspell.com/en/vs/pf-vs-pi)
- **PG** (https://plainspell.com/en/vs/pf-vs-pg)
- **PL** (https://plainspell.com/en/vs/pf-vs-pl)
- **PU** (https://plainspell.com/en/vs/pf-vs-pu)
- **PK** (https://plainspell.com/en/vs/pf-vs-pk)
- **PV** (https://plainspell.com/en/vs/pf-vs-pv)
- **PJ** (https://plainspell.com/en/vs/pf-vs-pj)
- **PW** (https://plainspell.com/en/vs/pf-vs-pw)
- **PX** (https://plainspell.com/en/vs/pf-vs-px)
- **put** (https://plainspell.com/en/vs/pf-vs-put)
- **pro** (https://plainspell.com/en/vs/pf-vs-pro)
- **pop** (https://plainspell.com/en/vs/pf-vs-pop)
- **pot** (https://plainspell.com/en/vs/pf-vs-pot)
- **pin** (https://plainspell.com/en/vs/pf-vs-pin)

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/pf