What is your name?
Wie heißt das auf Deutsch?
What is this called in German?
Was soll das heißen? (Cf. Was soll das bedeuten?).
What do you mean by that?
Das will nichts heißen.
That does not matter.
Es heißt, er sei gefährlich krank.
It is reported that he is dangerously ill.
Es soll nicht heißen, daß ...