waste ‧ ful /ˈweɪstf ə l/ BrE AmE adjective
[ Word Family: noun : ↑ wastage , ↑ waste , ↑ wastefulness , ↑ waster , ↑ wastrel ; adjective : ↑ waste , ↑ wasteful , ↑ wasted , ↑ wasting ; verb : ↑ waste ; adverb : ↑ wastefully ]
using more of something than you should, especially money, time, or effort OPP economical :
a wasteful use of resources
wasteful of
The software is very wasteful of memory.
—wastefully adverb :
Lily had wastefully left the light on.
—wastefulness noun [uncountable]