adv in a thin manner 薄; 细; 瘦; 稀疏
*Spread the butter thinly. 薄薄地涂一层黄油.
* thinly-sliced ham 切成薄片的火腿.

adv
in a way that has a very small distance between two sides or two flat surfaces
≠ thickly
　thinly sliced bread
scattered or spread over a large area, with a lot of space in between
　Sow the radish seeds thinly.
　The mountain regions are more thinly populated than the lowlands.
thinly disguised/veiled
if something is thinly disguised etc, someone is pretending it is something else, but you can easily see what it really is
　He looked at Frank's new car with thinly veiled envy.