To err - to make a mistake, to do something wrong
This is not an idiom or slang - it's just a straight-up definition meaning that if you're going to make a mistake, you're going to do it so that it ends up well instead of poorly. An example would be if you're making a rope swing for a pond - you'd use extra thick rope just in case it broke - you might end up using rope that's really thicker than needed, but it's better to be too thick than too thin, or better to err on the side of safety.
I will err on the side of caution.Err, who are you and what do you want?
Err on the side of caution.
This idiom uses the verb "err" not the noun error.To "err on the side of caution" is to take extra care, possibly unnecessary care, rather than potentially cause danger or mishap. This is usually applied in a situation where the actual riskinvolved cannot be clearly determined.
It's just as correct to say this term as it is to say "err on the side of [anything]". "Doctors want to err on the side of caution."
To err is to be mistaken or incorrect or to stray from the right course of accepted standards. Also to act with bias, as in to err on the side of justice
The phrase is "err on the safe side" meaning that if a mistake (error) could be made, it is better to be too cautious, or make it in the less dangerous manner.
To err is to make an error. Erred is the past tense of err.
err on the side of caution.
"err" usually means "error", but then again "to err is human".
The system will always err on the side of caution.
Err on the Side of Caution - 1997 was released on: USA: 10 November 1997 (premiere)
Erred on the side of caution.