Which definition best describes 'interval'?

• A. The space or spaces between things.
• B. The period of time between two things.
• C. A pause.
• D. A length of time.

Answer: (B)

The concept being tested is the time-based sense of interval: a span or gap separating two moments or events.

The best choice captures that idea—the period of time between two things. When we describe the interval between two events, we’re focusing on the duration that separates them, not on a physical space or a quick interruption. For example, the interval between two meetings is the amount of time that passes from one to the other.

Other senses exist but are less fitting here. A space between things focuses on gaps in physical layout rather than time. A pause implies a temporary stop within something already in progress, which is more specific than the general idea of a time span between events. A length of time emphasizes how long something lasts, rather than the gap separating two points in time.