1. a person or thing that gives notice or warning of something
2. a computer program or system that automatically sends alerts or notifications
Usage: technology

Examples

• The smoke detector serves as an important notifier in case of fire.
• She appointed herself as the notifier for all upcoming meetings.
• The email notifier alerts users when new messages arrive.
• The app includes a push notifier for breaking news updates.
• The security system has an automatic notifier that contacts the police.
• He works as a legal notifier, serving court documents to defendants.
• The weather notifier sends alerts about severe storm warnings.