Do you know an online dictionary that allows me to export list of words with their definitions?

Hi. I've been searching for it for a while but I cannot find anything. I want to export list of words and their definitions and include them in a site like Quizlet in order to study them. I've checked the most popular ones (Cambridge, Oxford, MacMillan etc..). There was one feature in the Cambridge's dictionary called "Quizzes" however it does not allow me to include my own words. You have to write the word then go on the page that has the definitions and click the stars in order to save them in a list and that will take years ... Anyways I have the list of words I only need to get the definitions FOR ALL OF THEM. I have tried the site EasyDefine but the definitions aren't very clear for some words also It doesn't support idioms ...

I cannot study without something like Anki or Quizzlet so it's very important for me to get the definitions for those words. Thanks in advance!