in plain English
US /ɪn pleɪn ˈɪŋ.ɡlɪʃ/
UK /ɪn pleɪn ˈɪŋ.ɡlɪʃ/

1.
in simple, clear language that is easy to understand
:
•
Can you explain that to me in plain English?
•
The lawyer explained the complex legal terms in plain English.
in simple, clear language that is easy to understand