SG Heritage Dictionary

Monotone [Noun] Webster's Dictionary 1828

In rhetoric, a sameness of sound, or the utterance of successive syllables on one unvaried key, without inflection or cadence.

Monotone [Noun] Webster's Dictionary 1913

1. A single unvaried tone or sound.

2. The utterance of successive syllables, words, or sentences, on one unvaried key or line of pitch.