1 [countable/uncountable] the way in which a set of things is arranged or done, so that it is clear which thing is first, second, third, etc.
order of: You can change the order of the list by using the “sort” command.
in order (=in the correct order): Please try to keep the pictures in order.
out of order (=in the wrong order): Some of the names on the list are out of order.
in alphabetical/chronological/numerical order (=in order according to spelling, time, or number): The computer puts the list in alphabetical order by last name.
in order of priority/importance/frequency etc.: We will deal with these problems in order of priority.
in reverse order (=in the opposite order to what is normal): Prizes will be given out in reverse order, starting with the team that finished third.
Synonyms and related words