What does “Turn a lemon(s) into lemonade” exactly mean?

Solution 1:

This is a rather popular, commonly used phrase (in many different variations).

No matter the exact wording, in general you want to keep in mind two things:

  1. Lemons are sour.
  2. Lemonade is sweet.

To make lemonade out of lemons is to take something that is not so great and turn it into something good.

A very common phrase is as follows: "When life gives you lemons, make lemonade."