v.1. To remove all the contents of something: I emptied out the trash barrel. The trash can is full—please empty it out.
2. To remove something from a container, leaving the container empty: I emptied the trash out of the can into a plastic bag. If you empty out all that junk from the garage, there will be some room for my bicycle.
3. To become devoid of people: The room emptied out after the mayor's speech.