1. To make something free from dirt and unwanted substances or marks, for example by washing or wiping it. English = clean, clean up.
2. To clear away the cups, plates and cutlery from a dinner table after a meal has been eaten.
3. To make something free from dirt and dust by wiping it with a cloth or by shaking a stick with feathers or rags attached to it near the dusty surface. English = dust.
4. To be very clean and unlikely to cause illness (because there are no germs). English = (be) hygienic.