[syn: fundamental, rudimentary, underlying]
The Collaborative International Dictionary of English v.0.48:
underlying \un`der*ly"ing\, a.
1. Lying under or beneath; as, the underlying strata of a
locality.
[1913 Webster]
2. Hence: Fundamental; basic; as, underlying principles;
underlying causes.
[1913 Webster +PJC]
3. Implicit; not immediately obvious; requiring careful
scrutiny to discover; as, the underlying sarcasm in her
seemingly innocuous remark..
[PJC]
WordNet (r) 3.0 (2006):
underlying
adj 1: in the nature of something though not readily apparent;
"shortcomings inherent in our approach"; "an underlying
meaning" [syn: implicit in(p), inherent,
underlying]
2: located beneath or below
3: being or involving basic facts or principles; "the
fundamental laws of the universe"; "a fundamental
incomatibility between them"; "these rudimentary truths";
"underlying principles" [syn: fundamental, rudimentary,
underlying]