(mathematics) an interval that includes its endpoints

a set of numbers between two endpoints where the endpoints themselves are not included, used in mathematics

(statistics) a range of values that is likely to include a population value with a certain degree of confidence

a span of time between two specific points or events

(statistics) a range of values likely to contain a population parameter with a certain level of probability

A train or bus traveling only part of its normal route, often used to manage traffic or during peak hours