slender, as in girth or form; slight in build or structure.

poor or inferior

a slim chance; a slim excuse.

small or inconsiderable; meager; scanty

a slim income.

sized for the thinner than average person.

to make slim.

to become slim.

Chiefly British . to try to become more slender, esp. by dieting.

a garment size meant for a thin person. ?

slim down,

to lose weight, esp. intentionally.

(of a business) to reduce operating expenses; economize.