geologic process geo·lo·gicp·rocess uncommon noun 1. (geology) a natural process whereby geological features are modified Synonymsgeological processgeologic process Related words Broader terms natural process Narrower terms alluviondesertificationdiastrophismerosionglaciationintrusionmetamorphismorogeny WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.