A diminution of something is its reduction in size, importance, or intensity.
例句
The president has accepted a diminution of the powers he originally wanted.总统已经接受了对自己原本要求的权力进行削减。...despite a slight diminution in asset value.尽管资产价值略有减少
英汉词典释义
n.
减小,减少,缩减
He experienced no diminution of his physical strength.他并未感觉体力衰落。
英英词典释义
Noun
1. change toward something smaller or lower
2. the statement of a theme in notes of lesser duration (usually half the length of the original)