Arranged from largest to smallest. Decreasing. Example: , 45, 22, 18, 2 are in descending order. See: Ascending Order. Move the ducks so they are in. Definition of Order explained with illustrated examples. Also, practice lots of math problems with fun math worksheets at Splash Math. Putting things into their correct place following some rule. In this picture the shapes are in order of how many sides they have. Another example: put the numbers.