Akademik

monotone
1. adjective /ˈmɒ.nə.təʊn,ˈmɑː.nə.toʊn/
a) having a single unvaried pitch

It is no very difficult matter to be loud in a high tone of voice; but to be loud and forcible in a low tone, requires great practice and management; this, however, may be facilitated by pronouncing forcibly at firſt in a low monotone; a monotone, though in a low key, and without force, is much more ſonorous and audible than when the voice ſlides up and down at almoſt every word, as it muſt do to be various.

b) property of a function to be either decreasing or increasing

The prominence of the syllables is more monotone than in English, the intonation of the latter having a larger variation of stressed and unstressed syllables.

2. noun /ˈmɒ.nə.təʊn,ˈmɑː.nə.toʊn/
A single unvaried tone of speech or a sound

When Tima felt like her parents were treating her like a servant, she would speak in monotone and act as though she were a robot.

3. verb /ˈmɒ.nə.təʊn,ˈmɑː.nə.toʊn/
To speak in a monotone.

Wikipedia foundation.