1. devices or substances that cause increased activity or energy in something
2. people who encourage or motivate others to take action

Examples

• The researchers tested various nerve stimulators on the patients.
• Economic stimulators helped boost the country’s growth rate.
• The coach acted as one of the team’s main stimulators.
• These appetite stimulators can help patients regain their desire to eat.
• The new policies served as job market stimulators.
• Teachers often function as intellectual stimulators for their students.