assumption

assumption is part of the Academic Word List. It is important for students in college and university.

[change] Noun

Singular
assumption

(countable) An assumption is a guess or belief about something without having enough information to know if it is true. In maths or science: something assumed to be true in order to build an argument or calculation.

You shouldn't make the assumption that guns are only a problem in big cities.

To calculate the age of a rock we make the assumption that the rate of radioactive decay is constant.