mutation stop

noun

: a pipe-organ stop sounding pitches other than those indicated by the notes or one of their octaves (as a fifth, a twelfth) compare foundation stop

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now