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To carefully plan or provide the details or something, especially by rendering it in some way, as by illustrating or outlining it. The committee mapped out the five-year plan with an extensive slideshow showing all the projected improvements. Look, I've mapped out our road trip in red marker so you can get a sense of the route we'll be taking.
map something out
to plot something out carefully, usually on paper. I have a good plan. I will map it out for you. I will map out the plan for you.
1. To plan something explicitly: Let's map out a way to accomplish this project. We mapped the trip out so we wouldn't get lost.
2. To incorporate or lay out some set of things into an explicit map, plan, or order: I've mapped out the beginning and end of each project on this timeline. The houses on these city blocks have been mapped out for demolition.