1
general::
Phrase(s): work at something
1. to work in a particular trade or craft. • He works at carpentry when he has the time. • Julie works at editing for a living. 2. to work on a specific task, machine, device, etc. • She was working at repairing the cabinet when I came home. • Todd is working at his computer.
McGrawhill's American Idioms And Phrasal Verbs