Order in mathematics may refer to: Contents. [hide]. 1 Algebra; 2 Analysis; 3 Arithmetic; 4 Combinatorics; 5 Fractals; 6 Geometry; 7 Graphs; 8 Logic; 9 Order Algebra · Analysis · Arithmetic · Combinatorics. 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. Order definition, an authoritative direction or instruction; command; mandate. Mathematics. to arrange (the elements of a set) so that if one element precedes. Earn College Credit "I aced the CLEP exam and earned 3 college credits! Help and Review Sampling: Creating a Custom Course. Remember that the steps for multiplication and division is one step. Sign up using Facebook. Contact the MathWorld Team.