flares
n. plural-only B2 Upper Intermediate US //ˈfɫɛɹz// UK //flˈeəz// flares
n. bright lights or flames used as signals, often to show where you are or to ask for help. They are common on ships, in planes, or during emergencies on the road.
n. devices that produce a bright light or flame for signaling, illumination, or identification in emergency situations. Often used in maritime, aviation, or automotive contexts.
The stranded hikers lit flares to signal the rescue helicopter.
After the engine failed at sea, the captain ordered the crew to launch emergency flares to alert nearby vessels.
The coast guard spotted several red flares on the horizon, indicating a vessel in distress approximately five miles from the shoreline.
Usage
Usually used in the plural when referring to the physical objects or the signals themselves.