plugin

noun
UK /ˈplʌɡ.ɪn/
US /ˈplʌɡ.ɪn/

A small piece of software that you add to a program to make it do more things.

I installed a plugin to block ads in my browser.

SYNONYMS

add-onextensionmoduleappletcomponent

RELATED WORDS

softwarebrowserinstallationappwidget

OTHER MEANINGS

2. A small device that connects to a machine or electrical system.

The technician replaced the faulty plugin connector.

3. A short piece of code that adds a feature to a website or content system.

The blog uses a plugin to show a photo gallery.

4. Something designed to be easily attached or inserted into a larger system.

The new plugin card lets the console read old game cartridges.