1. the process of making something thinner or less dense
2. the removal of some plants or trees to allow others more space to grow
Usage: forestry; gardening

1. present participle of thin; making or becoming less thick, dense, or numerous

1. becoming less thick, dense, or numerous

Examples

• The chef is thinning the sauce with more broth.
• Hair thinning is a common concern as people age.
• The forest requires thinning to prevent overcrowding.
• She noticed her thinning eyebrows needed attention.
• The thinning crowd began to disperse after the concert.
• Thinning paint with water can affect its coverage.
• The gardener recommended thinning the seedlings for better growth.