2. To be at the basis of; to form the foundation of; to support; as, a doctrine underlying a theory.

3. To be subject or amenable to. [R.] The knight of Ivanhoe . . . underlies the challenge of Brian der Bois Guilbert. Sir W. Scott.

UNDERLIE
Un`der*lie", v. i.

Defn: To lie below or under.

UNDERLIE
Un"der*lie`, n.

Defn: See Underlay, n., 1.

UNDERLINE
Un`der*line", v. t.

1. To mark a line below, as words; to underscore.

2. To influence secretly. [Obs.] Sir H. Wotton.

UNDERLING
Un"der*ling, n. Etym: [Under + -ling.]