| Noun | 1. | wastefulness - the trait of wasting resources; "a life characterized by thriftlessness and waste"; "the wastefulness of missed opportunities" Synonyms: thriftlessness, waste |
| 2. | wastefulness - useless or profitless activity; using or expending or consuming thoughtlessly or carelessly; "if the effort brings no compensating gain it is a waste"; "mindless dissipation of natural resources" Synonyms: waste, dissipation |