1. To decide in detail what you are going to do before you do it. English = plan, arrange.
2. Of an event or meeting, to make plans for it to happen. English = arrange.
3. For something you are going to make, build, or create, to decide and to prepare what the main parts of it will be and how they will be arranged. English = plan, design.
4. To plan secretly to do something. English = plot.