Lank — Defs

01 a. Slender and thin; not well filled out; not plump; shrunken; lean.

1.
Slender and thin; not well filled out; not plump; shrunken; lean.
“Meager and lank with fasting grown.” — Swift.

“Who would not choose . . . to have rather a lank purse than an empty brain?” — Barrow.
2.
Languid; drooping.[Obs.]
“Who, piteous of her woes, reared her lank head.” — Milton.

Phrases & compounds

Lank hair — long, thin hair.

02 v. i. & t. To become lank; to make lank.