[lún kuò]
outline; line; lineament; contour profile; rough sketch
the contour of a face
脸的轮廓
profile of the mountains
山峦的轮廓
Draw an outline before you fill in the details.
先画个轮廓， 再画细部。
Night fell, but the outline of the factory buildings was still discernible.; The factory buildings were silhouetted against the growing darkness.
夜幕降临了， 但厂房还能看见个轮廓。