This is the 2883rd most frequent German word.
weitaus
"Far" or "by far."
Weitaus is used here as an intensifier to express that the film stands out significantly among others.
Das ist weitaus der beste Film, den ich je gesehen habe.
This is by far the best movie I have ever seen.
Weitaus is used here to strongly emphasize the difference in height between the buildings.
Dieses Gebäude ist weitaus höher als das daneben stehende.
This building is considerably taller than the one standing next to it.
Weitaus is employed to stress the degree of preparation by comparison.