Plug-in (noun)

1. A software component that adds specific capabilities to a larger software application, allowing the application to perform additional functions.
2. A hardware component that connects to a computer, allowing it to use additional devices or software.
3. An extension or module that enhances the functionality of a software program.

Origin:

A compound word of 'plug' and 'in'.

Examples:

1. The web browser had a variety of plug-ins, such as ad-blockers and password managers.
2. The photographer installed a plug-in to add new features to their photo editing software.
3. The audio software had a plug-in that allowed it to record and process multiple audio tracks.
4. The plug-in for the video editing software added new transitions and special effects.
5. The plug-in for the e-commerce platform enabled the store to accept online payments.