- Untill otherwise -

What’s the meaning of the usage ‘untill otherwise’? Pls suggest a few examples.

“Until otherwise” would need to be accompanied by some verb in order to be precisely defined. You have given us a conjunction and an adverb. All I can say is that it means some action is expected to happen up to the point that something contrary occurs.

Until instructed otherwise, write in blue ink only. - Write in blue ink up to that point that you are told you can use something else.
Until he learns otherwise, do not reveal that Santa Claus does not exist. - Maintain the illusion that Santa Claus exists up to the point that he learns Santa Claus doesn’t.

thanks Mordant!