1. becomes or makes something softer, gentler, or less harsh
Usage: third person singular present tense of ‘mellow’
2. becomes or makes someone more relaxed and less aggressive with age or experience
Usage: often used about personality changes

Examples

• Wine mellows with age in the cellar.
• The harsh light mellows at sunset.
• His voice mellows when he speaks to children.
• Time mellows even the strongest emotions.
• She mellows out after her morning coffee.
• The cheese mellows as it ripens.