slimming
slim-ming
noun
The activity or process of losing body weight to become thinner.
"She's started slimming for summer."
adjective
Designed to make a person or garment appear thinner or to promote weight loss.
"She bought a slimming black dress."
Thesaurus
Synonyms: slender, lean, slight, slim, thin, svelte, slenderize, slim down, reduce, melt off, small, little