|1.||[ adjective ] (mathematics) of a sequence or function; consistently increasing and never decreasing or consistently decreasing and never increasing in value|
|Related terms:||nonmonotonic mathematics increasing_monotonic decreasing_monotonic|
|2.||[ noun ] (rhetoric) an unchanging intonation|
|Related terms:||intonation drone|
|3.||[ adjective ] sounded or spoken in a tone unvarying in pitch|
"the owl's faint monotonous hooting"
|4.||[ noun ] (music) a single tone repeated with different words or different rhythms (especially in rendering liturgical texts)|