great grandchild

1. 1.

   a child of your grandson or granddaughter

   Broadergrandchild

   Narrowergreat granddaughtergreat grandson

Questions about great grandchild

What does great grandchild mean?

great grandchild means "a child of your grandson or granddaughter".

Is great grandchild a common word?

great grandchild is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.