1. the branch of mathematics dealing with the properties and manipulation of numbers
2. computation with numbers

1. of or relating to arithmetic

Examples

• She struggled with basic arithmetic in elementary school.
• The arithmetic involved in calculating the tip was simple.
• Students must master arithmetic before moving on to algebra.
• He used mental arithmetic to solve the problem quickly.
• The arithmetic mean of the test scores was 85.
• Basic arithmetic operations include addition, subtraction, multiplication, and division.
• The arithmetic progression showed a clear pattern.