What does "sterile" mean to healthcare workers?

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What does "sterile" mean? Specifically, when a healthcare worker uses the term "sterile," what does a healthcare worker mean?

When I looked up "sterile" in two dictionaries, I saw two definitions, both of which were better than the others, but which seem to have problems.

Definition one: "free from living organisms and especially pathogenic microorganisms." https://www.merriam-webster.com/dictionary/sterile.

Definition two: "completely clean and not containing any bacteria that might cause infection." https://www.ldoceonline.com/dictionary/sterile.

The problem with each is they are phrased in absolute terms. I suspect that even things such as a sterile laboratory have some amount of pathogenic microorganisms and bacterial that might cause infection. Am I wrong? They just have less of those. As I understand the term, "sterile" would involve something cleaner than your dishes when they're in your dishwasher right after it has cleaned them.

When a healthcare worker uses the term "sterile," what do they mean? Thanks for your help.
 
"Sterile" in healthcare means that an item or environment has been treated to eliminate all viable microorganisms—even those that can cause infection. While in theory it sounds absolute, in practice it means the item meets strict sterilization standards (using methods like autoclaving or chemical sterilization) so that any microbes present are nonviable and pose no infection risk during procedures. It's not just "cleaner" than everyday objects—it’s been processed to a level that's safe for surgical or invasive use.
 

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