mono·ton·ic \| ̷ ̷ ̷ ̷|tänik\adjective Etymology:monotone (I) + -ic 1.: of, relating to, or uttered in a monotone < the monotonic buzzing of the voices carried — James Jones > 2.: producing only one musical tone 3.: being a mathematical function that either never decreases or never increases as the independent variable increases • mono·ton·i·cal·ly\-nə̇k(ə)lē\adverb