The meaning of UNDERLIE is to lie or be situated under. How to use underlie in a sentence. to lie or be situated under; to be at the basis of : form the foundation of : support… See the full definition. Games; Word of the Day; Grammar; Wordplay; New Slang; Rhymes; Word Finder; Thesaurus; Join MWU; More. Games; Word of the Day ...

UNDERLIE definition: 1. to be a hidden cause of or strong influence on something: 2. to be a hidden cause of or strong…. Learn more.