1. To make something smaller or less important, or to become smaller or less important; to reduce in bulk or amount; to lessen; opposed to augment or increase.
2. To lessen the authority or dignity of; to put down; to degrade; to abase; to weaken.
3. To contract a perfect or minor musical interval by one semitone.
4. To take away; to subtract; to decrease, lessen, abate, reduce, contract, curtail, impair, degrade.
5. To appear smaller, or to make something appear smaller.