WordNet sense 1 (the property possessed by a line or surface that departs from the vertical):

inclination, leaning, list, tilt

WordNet sense 2 (have a tendency or disposition to do or be something; be inclined):

incline, run, tend, incline, be given

WordNet sense 3 (containing little excess):

skimpy

WordNet sense 4 (of a quantity not able to fulfill a need or requirement):

deficient, insufficient

WordNet sense 5 (to incline or bend from a vertical position):

angle, slant, tip

WordNet sense 6 (producing little or no profit or gain):

unprofitable

WordNet sense 7 (thin and fit):

spare

WordNet sense 8 (being of delicate or slender build):

slender, slight, slim, svelte

WordNet sense 9 (being very thin):

scrawny, skinny

WordNet sense 10 (long and lean):

lank

WordNet sense 11 (tall and thin):

lanky

WordNet sense 12 (very thin especially from disease or hunger or cold):

emaciated, gaunt, haggard, wasted

WordNet sense 13 (lacking excess flesh):

thin