Monotonic

See: Monotonic Function, Function, Non-Monotonic.

References

of a sequence or function; consistently increasing and never decreasing or consistently decreasing and never increasing in value
flat: sounded or spoken in a tone unvarying in pitch; "the owl's faint monotonous hooting"

wordnet.princeton.edu/perl/webwn

In mathematics, a monotonic function (or monotone function) is a function which preserves the given order. This concept first arose in calculus, and was later generalized to the more abstract setting of order theory.

en.wikipedia.org/wiki/Monotonic

of or using the Greek system of diacritics which discards the breathings and employs a single accent to indicate stress; said of a function that ...

en.wiktionary.org/wiki/monotonic

en.wiktionary.org/wiki/monotonically

CYC Glossary http://www.cyc.com/cycdoc/ref/glossary.html
- monotonic: One of the possible values for strength. If a formula is asserted with a strength of :monotonic, the resulting assertion(s) will have a truth value of either monotonically true or monotonically false, depending on whether or not the asserted formula was negated. Monotonic rules may never have exceptions, and monotonic GAFs will never have their truth values changed in the course of argumentation. The only way a monotonic assertion can be removed from the inference playing field is by unasserting it. See also default.