1. [ adjective ] (mathematics) of a sequence or function; consistently increasing and never decreasing or consistently decreasing and never increasing in value
Synonyms: monotone
Related terms: nonmonotonic mathematics increasing_monotonic decreasing_monotonic
2. [ adjective ] sounded or spoken in a tone unvarying in pitch
Synonyms: monotonous monotone

"the owl's faint monotonous hooting"

Related terms: unmelodious
Similar spelling:   monotony