Definitions

1. noun

The state of being in good physical condition, especially with regard to muscle tone.

“The athlete’s muscles showed a good tonus after a few months of rigorous training.”

2. noun

The quality of being tense or strained, especially in a mental or emotional sense.

“The crowd’s tonus was palpable as the team won the championship.”

3. noun

The quality of firmness or elasticity of a muscle or other tissue.

“The doctor examined the patient’s tonus to determine the cause of the muscle weakness.”