Being, or having the salient properties of, a monotone function.
Having a single unvaried pitch.
A piece of writing in one strain throughout.
A single unvaried tone of speech or a sound.
To speak in a monotone.
Trivial, trifling or of little importance.
Having no force, inoperative, ineffectual.
Removable from a computer program with safety, but harmless if retained.
Ineffective, invalid or futile.