1. arranging or structuring something in an orderly way
Usage: British spelling
2. planning and coordinating an event or activity
Usage: British spelling
3. forming or establishing a group or organization
Usage: British spelling

Examples

• She is organising her closet by color and season.
• The committee is organising a charity fundraiser for next month.
• He spent the morning organising his desk and filing papers.
• They are organising a protest against the new policy.
• The teacher is organising students into study groups.
• She’s organising a surprise party for her friend’s birthday.
• The workers are organising themselves into a union.