1. To follow a particular schedule, plan, or procedure while working. It's important that we all work to the same guidelines, or else it won't all fit together right at the end. I work to a strict time schedule when I work from home.

2. To listen to a particular band or type of music while working. I've been working to heavy metal lately to keep me motivated throughout the day. I like to work to Bruce Springsteen when I'm painting.

3. To expend time, effort, and energy to cause something to reach a particular state. In this usage, a noun or pronoun is used between "work" and "to." We're trying to work the prototype to a playable demo before the big video game expo next month. The bill doesn't have a chance as it is currently, but I think I can work it to something that might pass through both houses of congress.

4. To instill a particular mental state in someone by provoking or agitating them. In this usage, a noun or pronoun is used between "work" and "to." I was worked to a panic when my kids didn't answer my phone calls. The organizer whipped the mob to a violent frenzy, leading to a riot breaking out along Main Street.