Error suppression is the act of preventing an error from surfacing in programming, without addressing it. (Note that suppressing errors is very often considered bad practice.)
Error suppression is the act of preventing an error from making itself apparent, without actually addressing the error itself (the act of addressing the error is error-handling).
Common methods of error suppression are surrounding it with try-catch / try-except statements, redirecting program output, and catching interrupts.
It should be noted that while there are a few circumstances where error suppression may be useful, it is usually looked on as bad practice, as suppressing errors can make debugging the code later a notoriously difficult prospect.