English Reference

Word

PDF

Phoneticspdf

/ˌpiˌdiˈɛf/

Definitions

01a type of computer file

A2 · Computing

n. Stands for Portable Document Format. A file format used to share documents so they always look the same on any device.

n. Abbreviation for Portable Document Format. A file format that captures all elements of a printed document as an electronic image that can be viewed, navigated, or printed.

“Please send the contract as a PDF so the formatting doesn't change.”

“The graphic designer exported the final brochure as a high-resolution PDF to ensure the printer received the exact layout intended.”

Technical

Synonyms

02to convert a file

B1 · Computing

v. to save or change a document into a PDF file.

v. to convert a digital document from its native format into a Portable Document Format file.

“Can you PDF that spreadsheet and email it to the manager?”

“After finishing the report in Word, she decided to PDF the document to prevent any unauthorised edits during the review process.”

Informal

Synonyms

03probability density function

C2 · Math

n. a mathematical way to show how likely different results are in a set of data.

n. Abbreviation for probability density function. A function whose value at any given sample in the sample space can be interpreted as providing a relative likelihood.

“The professor explained how to calculate the area under the PDF curve.”

“In advanced statistics, the PDF is essential for determining the probability of a continuous random variable falling within a particular range of values.”

Technical · Academic

04internet slang for an offender

C1 · Computing

n. a slang word used on social media to talk about a person who is attracted to children.

n. A euphemistic initialism used primarily on social media platforms to bypass automated content filters when referring to a paedophile.

“The video was removed because the creator was accused of being a PDF.”

“Commenters often use the term PDF to discuss criminal allegations without triggering the platform's automated censorship algorithms.”

Slang · Informal

Usage

Used almost exclusively in online comments and video captions to avoid platform bans.

Teaching tip

This is a very modern internet euphemism; students should be aware of it to understand social media discourse but should avoid using it in professional contexts.

Domains

ComputingInternet

This entry

Level
A2 · Elementary
Frequency
Frequent
Updated

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