1. thin (of an object)
これ以上薄くすると壊れない？Won't it break if you make it any thinner?
2. pale; light; faint
それぞれ色が薄いのから濃いのまできれいに並べてある。They are neatly arranged from the palest to the darkest colors.
3. watery; thin; diluted
4. weak (taste, etc.); little (affection, etc.); not much (of a presence)
反応は意外なほど薄い。The reaction is surprisingly weak.
5. slim (probability, etc.); small
望みは薄いけど、やらないよりはいいでしょ。The chances are slim, but it's better than not doing it, right?
6. sparse; patchy; scattered