1. Any of the signs such as 'two', 'nine', 'eleven' or the written symbols such as 1, 3, 47. You use them to say how many things you are referring to or where something comes in a series. English = number, figure.
2. The amount of something that you can measure or count. English = quantity, number.
3. Any of the ten written symbols from 0 to 9 that are used to represent a number. English = figure.