Definitions

1. verb

to arrange (items) in the order of the alphabet; to sort or categorize alphabetically

“The librarian has to alphabetise the books on the shelves.”

2. noun

the act of arranging (items) in the order of the alphabet

“The task of alphabetising the list took hours.”

3. verb (transitive)

to cause (something) to be arranged in the order of the alphabet

“The computer program was used to alphabetise the data.”