great grandparent
greatg·rand·pa·rent
noun
1.
a parent of your grandparent
Origin
From great- + grandparent.
Related words
Broader terms
Narrower terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.