What does blanching mean?

[Blossomhill]

Says to do this in of my recipies but I don't know what it mean

Does it mean to boil?

Plunge into boiling water. Usually only for a minute or two. You do it before freezing veg.

put in boiling what briefly

thank you :)

Think you then have to plunge it into very cold water don't you? Stops it from cooking further.