- The electronic reproduction of a given sound or image with relatively high accuracy.
- 1954 November 13, “The low-down on high fidelity”, in Billboard, page 127:
- High Fidelity is an attempt to minimize the effect of the electro-mechanical means necessary to the reproduction of music.
- A high-quality reproduction of sound.
- 1980 December 20, Maxell (advertisement), Billboard, page 75:
- AFTER 500 PLAYS OUR HIGH FIDELITY TAPE STILL DELIVERS HIGH FIDELITY