What does it mean to 'abate' something?

The term "abate" refers to a reduction in amount or intensity. It is often used in contexts where something that was previously strong, severe, or intense is made less so. For instance, one might say that a storm abated once the heavy winds and rains subsided. This captures the essence of the word, indicating a decrease or diminishing effect.

The other options provided do not align with the meaning of "abate." Increasing in intensity, completely eliminating something, or maintaining an unchanged level are all contrary to the concept of lessening. Therefore, the choice that signifies a reduction in intensity is accurately identified as the correct definition of "abate."