mid-air gesture
nounUK /ˌmɪdˈeə ˈdʒes.tʃə/
US /ˌmɪdˈer ˈdʒes.tʃɚ/
A movement you make with your hand in the air to tell a device what to do.
She changed the song with a quick mid-air gesture.
OTHER MEANINGS
2. A hand movement made in the air to show a feeling or idea to people.
He made a mid-air gesture to say hello from across the street.
3. A way of controlling a game or screen without touching it.
The game uses mid-air gestures to move the character.
4. A signal made in the air, like a wave or a point.
The pilot gave a mid-air gesture to the ground crew.