motion sensing
nounUK /ˈməʊ.ʃən ˌsen.sɪŋ/
US /ˈmoʊ.ʃən ˌsen.sɪŋ/
Motion sensing is when a device notices that something is moving.
The motion sensing light turns on when you walk into the room.
OTHER MEANINGS
2. A technology that lets a game console or phone respond to your body movements.
The motion sensing controller lets you play tennis by swinging your arm.
3. The ability of a security system to notice people or animals moving nearby.
The alarm uses motion sensing to spot anyone walking past the door.
4. A feature that wakes up a screen or device when you move near it.
Motion sensing keeps the tablet awake while you read.