0 a region in space where gravity is so strong that nothing, not even light, can escape --
1 a region in space where the force of gravity is so strong that nothing, not even light, can escape from it --
2 an activity or organization on which very large amounts of money are spent but which does not produce any profit or useful result: --
Fears that the operation would be a black hole proved well-founded.
3 a large amount of money that is owed by a company or government: --
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.