1. changing in only one direction; consistently increasing or consistently decreasing
Usage: mathematics
2. lacking in variety; tediously uniform or unchanging

Examples

• The monotonic function always increases as x gets larger.
• Stock prices showed a monotonic decline throughout the quarter.
• The data revealed a monotonic relationship between temperature and pressure.
• His monotonic speaking style put the audience to sleep.
• The monotonic sequence of numbers made the pattern easy to identify.
• Scientists observed a monotonic increase in carbon dioxide levels.
• The monotonic progression of the melody lacked musical interest.