Definition of sensor
1 : a device that responds to a physical stimulus (such as heat, light, sound, pressure, magnetism, or a particular motion) and transmits a resulting impulse (as for measurement or operating a control)
2 : sense organ
Examples of sensor in a sentence
Image sensors are used in digital cameras.
Infrared sensors can track an object's movement.
Did You Know?
Sensors are used today almost everywhere. Radar guns bounce microwaves off moving cars. A burglar alarm may use a photosensor to detect when a beam of light has been broken, or may use ultrasonic sound waves that bounce off moving objects. Still other sensors may detect pressure (barometers) or chemicals (Breathalyzers and smoke detectors). Stud finders, used by carpenters to locate wooden studs under a wall, may employ magnets or radar. Wired gloves, which relay information about the position of the fingers, are used in virtual-reality environments. A cheap car alarm may be nothing but a shock sensor, in which a strong vibration will cause two metal surfaces to come together.
Origin and Etymology of sensor
Latin sentire to perceive + English 1-or — more at sense
First Known Use: circa 1928
SENSOR Defined for English Language Learners
Definition of sensor for English Language Learners
: a device that detects or senses heat, light, sound, motion, etc., and then reacts to it in a particular way
Medical Definition of sensor
: a device that responds to a physical stimulus (as heat, light, sound, pressure, magnetism, or a particular motion) and transmits a resulting impulse (as for measurement or operating a control); also : sense organ
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Seen and Heard
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