English definition of “goodness”
› [U] the quality of being good: She believes in the goodness of human nature.
my goodness informal › something you say when you are surprised: My goodness, he's a big baby, isn't he?
thank goodness informal › something you say when you are happy because something bad did not happen: Thank goodness that dog didn't bite you.
for goodness sake › used when you are annoyed or when you want something to happen quickly: For goodness sake, come in out of the rain.