1. to cause something to operate or function; to activate
2. to motivate or drive someone to action

Examples

• Press this button to actuate the emergency brake system.
• The sensor will actuate the automatic doors when someone approaches.
• What forces actuated his decision to change careers?
• She was actuated by a desire to help others.
• The timer actuates the sprinkler system every morning.
• His speech was actuated by genuine concern for the community.
• The remote control can actuate various functions of the device.