What is this phrase actually used for? "Talking to someone in a condescending manner " or "talking to someone in simple terms" or does it mean both?
Source 1:(Cambridge Dictionary) https://dictionary.cambridge.org/dictionary/english/talk-down-to-someone
to speak to someone in a simple way, as if the person cannot understand things as well as you can:
Our history teacher never talks down to us.
Source 2: (The Collins Dictionary) https://www.collinsdictionary.com/dictionary/english-thesaurus/talk-down-to-someone
in the sense of condescend to:
She never talked down to her students.
Does it mean both of the things? If not then what can be used to mean "talking to someone in simple terms i.e. easy, layman's language" as in The Cambridge Dictionary?