PDF

• IPA^(key): /pi di ɛf/

• Audio (US):

  (file)

PDF

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

PDF (countable and uncountable, plural PDFs)

1. (computing) Initialism of Portable Document Format, a standard for representing electronic documents, allowing them to be transmitted and reproduced accurately with the same printed layout.
   • 2021, Alexander Thomasian, Storage Systems..., §2.13.7:

     DjVu was developed at AT&T Research by Yan^[sic] 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.

2. (computing) Initialism of portable document format (“document in PDF format”).
   • 2019 June 27, Jack Schofield, “What’s the best cheap tablet or e-reader for PDF files?”, in The Guardian‎^[1]:

     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.

3. (probability theory) Alternative letter-case form of pdf (“probability density function”)
4. (Unicode) Initialism of pop directional format.

• Translingual: .pdf

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

1. (transitive) To convert to PDF format.

• PFD