1. not arranged in a particular sequence or pattern; lacking organization
2. not requested or commanded
3. having no specific sequence or ranking
Usage: mathematics; computer science

Examples

• The books were left in an unordered pile on the desk.
• She received unordered merchandise in the mail.
• The data appeared as an unordered list of numbers.
• His thoughts were unordered and difficult to follow.
• The unordered set contained no duplicate elements.
• The restaurant served unordered appetizers to every table.
• The unordered collection of photos needed to be sorted by date.