He plans to 'thin' (out) the young carrots in the garden. [=to remove some of them so that there is more room between the remaining carrots]
His hair is a little 'thin' on top. = He's a little 'thin' on top. [=he does not have a lot of hair on the top of his head]
The bank's decision to raise rates could be 'the thin end of the wedge'. [=many other banks may also decide to raise rates]
(..) (grunting) Ah. MARGE: Oh. It's like Disneyland for thin people. Did you know that the Grand Canyon was created by erosion? And before , it was called Big Canyon? Okay, that's it. (..)2016 TvShow: The Simpsons Title: Fland Canyon Season: 27 Episode 19