theremin
/ˈθɛrəmɪn/
noun
- An electronic musical instrument that you play by moving your hands near two antennas, without touching the instrument. The pitch and volume of the sound change depending on the position of your hands.
- The musician played a haunting melody on the theremin at the concert.
- She learned to control the theremin by carefully moving her hands in the air.
- The theremin is often used in science fiction movie soundtracks to create eerie sounds.