1. a system of written symbols used to represent numbers, amounts, or elements in a field of study
2. a short note or annotation written to explain or comment on something

Examples

• Mathematical notation uses symbols like + and – to represent operations.
• Musical notation allows composers to write down their melodies.
• The teacher made a notation in the margin of my essay.
• Scientific notation is used to express very large or very small numbers.
• Chess notation records the moves of each game.
• The doctor’s notation in the chart was difficult to read.
• Binary notation uses only the digits 0 and 1.