1 to stop illegal or dishonest activity in a place or organization: --
2 to stop or limit the violence, sex, or bad behaviour shown or contained in programmes or books, magazines, etc., to make them more acceptable: --
Some people think that television should be cleaned up.
3 to stop illegal and dishonest activity in a company, system, etc.: --
4 to remove harmful substances or chemicals from a place or the environment: --
clean up pollution/contamination/waste $250 million was spent on cleaning up groundwater contamination at the former factory's site.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.