0 used to refer to lines or distances east or west of an imaginary line between the North Pole and the South Pole : --
1 in the long direction of the body or of any body part: --
a longitudinal rash
2 Longitudinal research is done on people or groups over a long period of time: --
3 lengthwise: --
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.