Thank you for your question! My apologies for the delay. Here are some brief definitions with links to the Community Tool Box pages that have more information.
Vision Statement: Your vision is your dream. It's what your organization believes are the ideal conditions for your community; that is, how things would look if the issue important to you were completely, perfectly addressed.
Mission Statement: An organization's mission statement describes what the group is going to do and why it's going to do that.
Strategy/Strategic Plan: A strategy is a way of describing how you are going to get things done. A strategic plan is a summary of your strategies. Strategic plans can be linked to Action Plans, which outlines who will do what by when.
Objectives: Objectives refer to specific measurable results for the initiative's broad goals.
Good luck as you work on envisioning your work and the ways you will achieve your goals through strategic planning. All my best!