1. continuing for a long period of time without interruption
2. maintained at a steady level or intensity

Examples

• The team made a sustained effort to improve their performance.
• She received sustained applause after her speech.
• The company showed sustained growth over five years.
• The patient requires sustained medical attention.
• The sustained winds reached 80 miles per hour.
• His sustained interest in music led to a career change.
• The drought caused sustained damage to crops.