It means something that lacks in a total variety. Check Sentencehouse for more examples
- If you are stagnant in humdrum job, it is always important for you to diversify and look into some other sectors stop who knows, you might find a job of your telling.
- While everybody made their way to the humdrum event, I knew from the very beginning that this was going to be something that I would not at all want to be a part of.
- Since I was forced to go and watch the humdrum romantic movie, all I could do was to gorge myself on the food that I had purchased before entering the theatre.
- With so many games in your computer, how do you end up leaving humdrum life?
- The speech of the professor was humdrum enough to let at least 50% of the population go to sleep in the class itself.
- When you go on a long trip, to prevent it from being humdrum, have some sort of fun games or music in your car.