1. arranging or organizing things into groups or classes based on shared characteristics
Usage: present participle of 'categorise' (British spelling); American English typically uses 'categorizing'

Examples

• The librarian is categorising the new books by genre and author.
• We are categorising the survey responses into five different groups.
• She spent the afternoon categorising her collection of vintage records.
• The system works by categorising customers based on their purchasing habits.
• They are categorising the data to identify patterns in the results.
• He is categorising the plants according to their growing season.