1. highest in position; at the very top
2. most important; of the highest priority or rank

Examples

• The flag flew from the topmost branch of the tree.
• She reached for the book on the topmost shelf.
• The topmost floor of the building offers stunning views.
• Safety is our topmost concern during the construction project.
• The topmost priority is getting everyone to safety.
• He climbed to the topmost peak of the mountain.
• The topmost layer of soil was rich and dark.