- of, relating to, or uttered in a monotone: a monotonic delivery of a lecture.
- Mathematics.
- (of a function or sequence) either consistently increasing in value and never decreasing, or consistently decreasing in value and never increasing: A monotonic sequence can either converge or diverge, but it can never oscillate.
- (of an ordered system of sets) consisting of sets such that each set contains the preceding set or such that each set is contained in the preceding set.
