What does interval mean?
An interval is a distinct period, space, or range between one point and another. Its everyday use usually describes a gap in time, such as an interval between trains or a short break in the middle of a game. The word also has precise mathematical and technical uses: a confidence interval, for example, is a range of values associated with an estimated result, while an interval between two numbers marks the distance or boundaries separating them. In anatomy, an interval is the space between structures. The term is useful because it applies not only to time but also to measurable spaces and ranges. Its neutral tone allows it to describe any separation between two events, points, values, or limits, without implying that the separation is necessarily undesirable.
nounA period of time between two events, moments, or actions. It can also refer to the space or numerical range between two points, values, or boundaries.
- A period of time between two events or actions.
- The space between two objects, points, or surfaces.
- A range between two numerical values.
- A break or pause between activities, such as in a school timetable or sports match.
- A bounded period of time, especially one marked by a particular condition or event.
"There was a long interval between the opening performance and the start of the second half."
"The interview was scheduled at a ten-minute interval throughout the afternoon."
"Temperatures remained within a narrow interval during the winter months."
The plural is used for separate periods of time, spaces, or ranges.
"The train departed at intervals of fifteen minutes."
An interval is more than a pause: it is the measurable space created when one event ends and another begins.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does interval come from?
Interval comes from Latin intervallum, originally meaning the space between ramparts or defenses. The word developed from inter-, meaning “between,” and vallum, meaning “rampart” or “earthwork.” English borrowed it in the 17th century for a period of time between events and later extended its use to spaces and numerical ranges. It is related to Latin vallis, the source of English valley.
How interval is actually used
In general use, interval most often refers to a period of time. In technical and mathematical contexts, it may refer to the range between two values or the space separating two points or structures.
Easily confused with interval
An interval is a period or space between things, whereas to intervene means to come between or step in.