Origin: Germanic Old English suffix
Flashlight has 3 different meanings across 1 category:
a small portable battery-powered electric lamp
"She turned on her flashlight to see in the dark cave."
A battery-powered hand-held light source.
"He reached into his pocket to pull out a flashlight and illuminate the dark path ahead."
In plain English: A flashlight is a portable device that uses batteries to create a bright beam of light for seeing in dark places.
"I used my flashlight to find my keys in the dark hallway."
Usage: Avoid using the term in formal writing where "torch" or specific technical descriptors are preferred, as "flashlight" carries a distinctly casual register. Do not confuse this noun with the verb form when describing the act of shining light unless explicitly referring to the device itself.
To illuminate with a flashlight.
"The hiker used his flashlight to illuminate the dark path ahead."
In plain English: To flash someone with light is to briefly shine a flashlight at them, often as a signal.
"The children used their flashlights to find fireflies in the dark yard."
The word flashlight is a straightforward compound formed by combining the words flash and light. It was first used to describe an electric lamp that produces a sudden burst of illumination rather than a steady beam.