What is the meaning of the word "boil down"?

Definitions:

  1. to be cooked until very little liquid is left copy to clipboard verb
    • I boiled down the stock until it was thick and creamy. copy to clipboard
  2. to be the essential element copy to clipboard verb
    • Let's boil it down to the facts. copy to clipboard
  3. to cook until very little liquid is left copy to clipboard verb
    • I boiled down the sauce until it was thick. copy to clipboard

Synonyms: