This is the 4400th most frequent German word.
gross
"Gross" in German means "big" or "tall."
Here, 'groß' is used metaphorically to describe someone's generosity or kindness.
Er hat ein großes Herz.
He has a big heart.
In this sentence, 'groß' is part of a compound noun, 'Großeltern', meaning grandparents, where 'groß' denotes a generational relationship.
Die Großeltern besuchen uns morgen.
The grandparents will visit us tomorrow.
In this sentence, 'groß' is used as an adjective to describe the size of an object.