To lie under; to rest beneath; to be situated under; as, a stratum of clay underlies the surface gravel.
To be at the basis of; to form the foundation of; to support; as, a doctrine underlying a theory.
To be subject or amenable to. [R.] The knight of Ivanhoe . . . underlies the challenge of Brian der Bois Guilbert. Sir W. Scott.
To lie below or under.
See Underlay, n., 1.
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