Word.ws English Dictionary

pdf

/pi di ɛf/

pdf is the initialism of probability density function.

pdf is the alternative letter-case form of PDF.

pdf is the alternative form of PDF file.

Meaning of probability density function

Noun

probability density function (plural probability density functions)

  1. Any function whose integral over a set gives the probability that a random variable has a value in that set.

Meaning of PDF file

Noun

PDF file (plural PDF files)

  1. (Internet, euphemistic) Filter-avoidance spelling of pedophile
  2. Used other than figuratively or idiomatically: see PDF, file.

Proper noun capitalized: PDF

PDF

  1. (abbreviation, initialism, obsolete) Initialism of Parkinson's Disease Foundation, now just Parkinson's Foundation.
  2. (abbreviation) Abbreviation of People's Defence Force (“armed paramilitary anti-military-rule rebel group in Myanmar”).

Noun capitalized: PDF

PDF (countable and uncountable, plural PDFs)

  1. (abbreviation, initialism) Initialism of Portable Document Format, a standard for representing electronic documents, allowing them to be transmitted and reproduced accurately with the same printed layout.
    • DjVu was developed at AT&T Research by Yan LeCun et al. in 1966. It generates files that are smaller than PDF files. […] PDF primarily encodes graphics and text as vectorized data, whereas DjVu primarily encodes them as pixmap images.2021, Alexander Thomasian, Storage Systems..., §2.13.7
  2. (abbreviation, initialism) Initialism of portable document format (“a document in PDF format”).
    • The reMarkable PDF reader is really targeted at the digital writing market, rather than the digital reading market, though most serious e-readers support pens for annotations and signatures.2019 June 27, Jack Schofield, “What’s the best cheap tablet or e-reader for PDF files?”, in The Guardian
    • Teams are required to clearly highlight the relevant specification or standard (e.g., ASTM number, VOC content) directly on the PDF for each material to demonstrate compliance.
      Provide PDFs of basic technical information for materials lacking specific requirements. For example, printouts from store...2025 September 2, “2026 American Society of Civil Engineers Concrete Canoe Competiton Request for Proposals”, in ASCE, archived from the original on 07 Sep 2025, page 26
  3. Alternative letter-case form of pdf (“probability density function”).
  4. (abbreviation, initialism, Unicode) Initialism of pop directional format.

Verb capitalized: PDF

PDF (third-person singular simple present PDFs, present participle PDFing, simple past and past participle PDFed)

  1. (transitive) To convert (something) to PDF format.
    Synonyms:
    PDFify, PDFize

Synonyms of pdf

Forms of pdf

Noun
pluralpdfs
pluralPDFs
Verb
third-person singular presentPDFs
present participlePDFing
past participlePDFed
pastPDFed

Words formed from pdf

Phrases with pdf

Questions about pdf

What does pdf mean?
Pdf means to convert (something) to PDF format.
What is pdf the initialism of?
Pdf is the initialism of probability density function.
What part of speech is pdf?
Pdf can be a proper noun, a noun or a verb.
How do you pronounce pdf?
Pdf is pronounced /pi di ɛf/.

Words near pdf in the dictionary

  1. PDD-NOS
  2. PDDs
  3. PDE
  4. PDEA
  5. PDEs
  6. pdf
  7. PDF file
  8. PDF files
  9. PDFA
  10. PDFed
  11. PDFify

Source and license

Adapted from Wiktionary: pdf (page history and authors); PDF (page history and authors); probability density function (page history and authors); PDF file (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: En-us-PDF.oga.

Cite this entry: “pdf.” Word.ws, https://word.ws/pdf. Based on Wiktionary, CC BY-SA 4.0.