Flashlight/ˈflæʃlaɪt/ Definition 1 of 2Pro Tip 1/3Nighttime Usage Flashlights are commonly used when it's dark, especially outside where there are no lights. He grabbed his flashlight during the blackout. Pro Tip 2/3Emergency Tool A flashlight is considered an essential tool in emergency kits for power outages or disasters. Make sure to pack a flashlight in your emergency kit. Pro Tip 3/3Camping Essential Flashlights are a must-have for camping trips to navigate in the wilderness at night. She packed her flashlight for the camping trip.