To reduce in amount, degree, or intensity; to lessen. The storm finally began to abate after several hours of heavy rain.
To become null and void, especially in legal contexts. The court ruled that the claim would abate upon the plaintiff's death.
To diminish or put an end to something perceived as hostile, threatening, or negative. Efforts were made to abate the noise from the construction site.
To deduct or subtract from a total amount. The seller agreed to abate ten dollars from the final price.