or

conjunction:used to link alternatives, indicating a choice between them
- You can have tea or coffee.
conjunction:used to introduce a consequence
- Hurry up, or we will be late.
conjunction:used to introduce a threat, often in the form 'or else'
- Finish your homework now, or else you won't be allowed to play video games.
conjunction:used to indicate approximation between numbers or quantities
- The hike is five or six kilometers.