0 used to connect different possibilities: --
Are you listening to me or not?
The patent was granted in (either) 1962 or 1963 - I can't quite remember which.
It doesn't matter whether you win or lose - it's taking part that's important.
There were ten or twelve (= approximately that number of) people in the room.
He was just kidding - or was he (= but it is possible that he was not)?
1 if not: --
2 used to show that a word or phrase means the same as, or explains, limits, or corrects, another word or phrase: --
Rosalind, or Roz to her friends, took the initiative.
Things have been going very well recently. Or they were, until two days ago.
3 used to describe something on a coat of arms (= a special shield or shield-shaped pattern that is the sign of a family, university, or city) that is gold or yellow: --
The city's crest is a fleur-de-lys or between two roses argent.
4 abbreviation for operating room US --
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.