1. arranging words, names, or items in the order of the letters of the alphabet
Usage: present participle of alphabetise (British spelling); American English typically uses 'alphabetizing'

Examples

• The librarian is alphabetising the new books by author's last name.
• She spent the afternoon alphabetising the contact list on her computer.
• Alphabetising the index made the reference guide much easier to use.
• The students are alphabetising the vocabulary words for their spelling test.
• Before alphabetising the files, we need to decide on a consistent naming system.