I. ˈmä-nə-ˌtōn noun
Etymology: Greek monotonos monotonous
Date: 1644
1. : a succession of syllables, words, or sentences in one unvaried key or pitch
2. : a single unvaried musical tone
3. : a tedious sameness or reiteration
4. : a person unable to produce or to distinguish between musical intervals
II. adjective
Date: 1760
1. : monotonic 2
2. : having a uniform color