Definition of "pluggable" [pluggable]

• Capable of being plugged, or plugged in, especially in reference to optional components of software (adjective)

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• "Drupal has a base setup that can be expanded by "pluggable" modules."
• "All switches are front panel "pluggable", and when combined with the built-in relay odometer, facilitate quick field maintenance and service activities."
• "Notable new features are: better Unicode support, proper support for time after the Y2038 barrier, new APIs to allow developers to extend Perl with 'pluggable' keywords and syntax, warnings for deprecated features and more."