Being, or having the salient properties of, a monotone function.
Having a single unvaried pitch.
To speak in a monotone.
A piece of writing in one strain throughout.
A single unvaried tone of speech or a sound.
Having no reason for being (raison d’être); having no point, reason, or purpose.
Done in a careless or perfunctory manner.
Having no effect.
Reluctant to work or to exert oneself.
Of a person, possessing a bored indolence.