1. smaller intervals that are parts of a larger interval, especially in mathematics
Usage: mathematics; plural form

Examples

• The mathematician divided the interval into several subintervals for analysis.
• Each subinterval was examined separately to find the maximum value.
• The integration process requires breaking the domain into subintervals.
• We calculated the area under the curve using rectangular subintervals.
• The function’s behavior changes across different subintervals.
• Students learned to identify subintervals where the function is increasing.