What is Wilt?
Wilt is (noun) a disease of plants which makes them droop The lettuces are all suffering from wilt. (verb) to become weak and droop We’ve had no rain for days and the plants in the garden have started to wilt. We all started off at a fast pace, but after the first mile or so some of us began to wilt.
source: Easier English, Student Dictionary Upper Intermediate Level