1. a substance or device that causes something to become active or to start working
2. a person who makes something active or puts something into action
3. a chemical substance that increases the activity of an enzyme or other biological process
Usage: biochemistry

Examples

• The enzyme activator increased the reaction rate significantly.
• She served as the main activator for the community cleanup project.
• The washing powder contains a stain activator that works in cold water.
• Scientists discovered a new protein activator in the cell membrane.
• The remote control acts as an activator for the security system.
• Adding the chemical activator made the glue set faster.
• He was the key activator behind the school’s recycling program.