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]
(..) A dry martini. Wait. Three measures Gordon's, one of vodka... ...half of Kina Lillet, shake it over ice... -... then add a thin slice of lemon peel. -Yes, sir. -You know, I'll have one of those. -So will I. Certainly. My friend, bring me one as well. (..)2006 Casino Royale