FAPP

F4A1P3P3
/fæp/

A form of for all practical purposes — effectively, virtually; practically

Scrabble 11

Meanings

prepositional phrase
  1. abbreviationhuman sciencesAbbreviation of for all practical purposes.

    Newtonian physics works fine, FAPP, at the macroscopic level, say Rosenblum & Kuttner[…]

    2019, David Yeats, A Universe Full of Magical Things, page 45
    2 more examples

    Is it not good to know what follows from what, even if it is not necessary FAPP? Suppose for example that quantum mechanics were found to resist precise formulation. Suppose that when formulation beyond FAPP is attempted, we find an unmovable finger obstinately pointing outside the subject, to the mind of the observer, to the Hindu scriptures, to God, or even only Gravitation? Would that not be very, very interesting?"

    1988, John Stewart Bell, Speakable and Unspeakable in Quantum Mechanics, Cambridge University Press

    Going beyond FAPP to interpret quantum theory is today a growth industry, and a contentious field, though a very small fraction of physicists are involved.

    2011, Bruce Rosenblum, Fred Kuttner, Quantum Enigma, page 206

Synonyms & antonyms

Origin

Popularized by physicist John Stewart Bell.

Full word history & related roots →

Rhymes & wordplay

Rhymes with FAPP

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Sounds the same

Cite this entry
APA

FAPP. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/FAPP

MLA

“FAPP.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/FAPP. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “FAPP,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/FAPP.

Source: FAPP on Wiktionary, CC BY-SA 4.0.