English Reference

Word

piracy

Phoneticspira·cy

US/ˈpaɪɹəsi/

UK/pˈaɪəɹəsˌi/

Definitions

01robbery at sea

B2 · Law

n. the crime of attacking ships at sea to steal goods or take control of the vessel.

n. the practice of attacking and robbing ships at sea; legally, it involves unauthorized acts of violence or detention on the high seas.

“The navy was sent to the coast to protect merchant ships from piracy.”

“International maritime law provides a framework for prosecuting piracy, which remains a significant threat to global trade routes in certain regions.”

Usage

Uncountable when referring to the general practice; countable when referring to specific incidents.

Synonyms

buccaneeringhijackingmarauding

02illegal copying

B2 · Computing

n. the act of illegally copying and selling books, films, music, or computer programs.

n. the unauthorized use or reproduction of copyrighted or patented material, especially for commercial gain.

“Software piracy costs the technology industry billions of dollars every year.”

“The studio implemented advanced digital rights management to combat the rampant piracy that typically follows a major film release.”

Usage

Often used as an uncountable noun in the context of intellectual property law.

Synonyms

infringementbootleggingtheft

03unlicensed broadcasting

C1

n. running a radio or TV station without a legal license.

n. the operation of an unlicensed radio or television station, often broadcasting from international waters to bypass national regulations.

“In the 1960s, radio piracy was common as DJs broadcast from ships.”

“The government cracked down on radio piracy by introducing stricter licensing laws and seizing illegal transmitters.”

Technical

Teaching tip

This sense is less common today due to the rise of internet streaming, but it is historically significant in British media history.

Synonyms

unlicensed broadcasting

Real-World Examples

“Why is there an increase in piracy off Somalia?”
UN News · 8 Sept 2026

Etymology

From Medieval Latin pīrātia, from Classical Latin pīrāta + ia, or Ancient Greek πειρατεία (peirateía).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

piracyNounpirateNoun

Domain

Nautical

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

englishreference.com/q/piracy

English Reference