negative regulation of mitochondrial membrane potential

Any process that stops, prevents, or reduces the frequency, rate or extent of establishment or extent of a mitochondrial membrane potential, the electric potential existing across any mitochondrial membrane arising from charges in the membrane itself and from the charges present in the media on either side of the membrane.

Definition from the Gene Ontology (GO:0010917), read 2026-09-23. CC BY 4.0.