1. Objects, things, or elements that are tediously uniform, lacking in variety, and repetitive in nature
The monotonous items on the assembly line made the job incredibly boring.
Os itens monótonos na linha de montagem tornavam o trabalho incrivelmente entediante.
2. Repetitive or unvarying things that lack interest or excitement
She sorted through monotonous items in the warehouse all day.
Ela classificou itens monótonos no armazém o dia todo.