"As soon as he got home, he went to his desk and set to work.; Every day he sets to work at the new assignments."
2.VerbTo begin working at.
"As soon as I could, I set to work making the entries."
3.VerbTo cause to begin working.
"I will immediately set them to work.; I was setting the children to work cleaning their rooms.; I set the pump to work getting the water out of the basement."