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]
(..) Well, nothing really. I mean, this is- I mean, really, this is the social event of the season. Oh, oh, my God. Andy, you look so chic. Oh, thanks, Em. You look so thin. - Do I? - Yeah. Oh, it's for Paris. I'm on this new diet. It's very effective. (..)2006 The Devil Wears Prada