1. the act or process of making something smaller, weaker, or less important; reduction
2. the state of being reduced in size, strength, importance, or value

Examples

• The diminishment of the forest due to logging has alarmed environmental groups.
• She felt a diminishment of her confidence after the failed presentation.
• The company's profits showed a steady diminishment over the past year.
• There was a noticeable diminishment in the quality of the product after the recipe change.
• The diminishment of natural resources threatens future generations.
• He resented any diminishment of his authority in the organization.