in layperson's terms

In words that can be understood by people outside of a given profession or field of expertise, i.e., without the use of jargon or highly technical terms. Chronic atherosclerosis in the coronary arteries has stopped oxygen-rich blood from reaching the heart, leading to a myocardial infarction. In layperson's terms, you've suffered a heart attack. I wish these software agreements would be written in layperson's terms, rather than this legalese gobbledygook. Doc, what the heck is idiopathic thrombocytopenic purpura? Explain it in layperson's terms—what exactly is wrong with me?