This is the 3657th most frequent Polish word.
holender
"Holender" in English means "Dutchman" or "a person from the Netherlands."
'Holender' here is used as a noun denoting a person from the Netherlands.
Holender mieszka w Amsterdamie.
The Dutchman lives in Amsterdam.
'Holender' is used here as a noun referring to a type of bicycle also known as a Dutch-style bike.
Kupiłem holender na rowerowy rajd.
I bought a Dutch-style bicycle for the cycling rally.
In this sentence, 'holender' is used to refer to a game, possibly a colloquial or regional expression in Polish meaning a specific activity.