2. Slender, slight, slim imply a tendency toward thinness. As applied to the human body, slender implies a generally attractive and pleasing thinness: slender hands. Slight often adds the idea of frailness to that of thinness: a slight, almost fragile, figure. Slim implies a lithe or delicate thinness: a slim and athletic figure. 4. trivial, trifling. 5. fragile, feeble, fine, delicate, flimsy.