Fetching details from the dictionary...

thin (of an object)
pale; light; faint
watery; thin; diluted
weak (taste, etc.); little (affection, etc.); not much (of a presence)
slim (probability, etc.); small
sparse; patchy; scattered
この布はとても薄いね。
This fabric is very thin.
薄い壁だから隣の音が聞こえる。
The wall is thin, so I can hear the neighbors.
薄くて軽いノートパソコンを探しています。
I'm looking for a thin and light laptop.