1. made lighter in weight or burden
Usage: past tense and past participle of ‘lighten’
2. made brighter or less dark
Usage: past tense and past participle of ‘lighten’
3. made less serious or more cheerful
Usage: past tense and past participle of ‘lighten’

Examples

• She lightened her backpack by removing unnecessary items.
• The morning sun lightened the dark room.
• His joke lightened the tense atmosphere.
• The load was lightened after we redistributed the weight.
• The sky lightened as dawn approached.
• Her mood lightened when she heard the good news.
• They lightened the cargo before takeoff.