1. a device used to start a fire or cause something to burn
2. a person who starts or initiates something, especially conflict or excitement

Examples

• The gas grill wouldn’t start because the igniter was broken.
• She used a long igniter to light the candles on the high shelf.
• The rocket’s igniter fired perfectly during the launch sequence.
• He was known as the igniter of many heated debates in class.
• The pilot light serves as an igniter for the main burner.
• The electronic igniter made starting the fireplace much easier.