mon·o·tone 
(mŏnə-tōn′)
(mŏnə-tōn′)n.
1. A succession of sounds or words uttered in a single tone of voice.
2. Music
a. A single tone repeated with different words or time values, especially in a rendering of a liturgical text.
b. A chant in a single tone.
3. Sameness or dull repetition in sound, style, manner, or color.
adj.
1. Characterized by or uttered in a monotone: a monotone recitation of names.
2. Of or having a single color: a cat with a monotone coat.
3. also mon·o·ton·ic (mŏn′ə-tŏnĭk) Mathematics Designating sequences, the successive members of which either consistently increase or decrease but do not oscillate in relative value. Each member of a monotone increasing sequence is greater than or equal to the preceding member; each member of a monotone decreasing sequence is less than or equal to the preceding member.
[From Greek monotonos, monotonous; see MONOTONOUS.]
mon′o·tonic (-tŏnĭk) adj.
mon′o·toni·cal·ly adv.