There are several synonyms for the phrase "muscle tone." Some of these include muscle definition, muscular tension, muscular development, and muscle firmness. These terms all refer to the state of the muscles in a person's body and how they appear and function. Muscle tone can be improved through exercise and strength training, as well as through proper nutrition and rest. Keeping the muscles in good condition can help to prevent injuries and reduce pain and discomfort. Synonyms for muscle tone can be helpful in describing different aspects of physical fitness and overall health.