sensor
word
Definition
A device or part that detects changes in its environment, such as light, heat, movement, or pressure, and sends information to another system.
Usage & Nuances
Used in technical, scientific, and everyday contexts—common collocations include 'motion sensor', 'temperature sensor', 'sensor network'. Refers to physical or electronic devices, not people. Do not confuse with 'censor' (to block content). Usually countable.
Example Sentences
A smoke alarm uses a sensor to detect fire.
basic
My phone has a light sensor that adjusts the screen brightness.
basic
The robot stopped moving because its sensor was blocked.
basic
Most modern cars use sensors to help drivers park safely.
natural
The weather station collects data from multiple sensors.
natural
If the motion sensor doesn’t work, the lights won’t turn on automatically.
natural