1. people who plan and coordinate events, activities, or groups
Usage: British spelling
2. containers or systems used to arrange and store items in an orderly way
Usage: British spelling

Examples

• The event organisers worked for months to plan the festival.
• Concert organisers expect over 10,000 attendees.
• The protest organisers obtained the necessary permits.
• She bought desk organisers to keep her office supplies tidy.
• Drawer organisers help maximize storage space.
• The closet organisers made it easy to find clothes.
• Wedding organisers handle all the details for couples.