1. underly - Adjective
2. underly - Verb
3. underly - Adverb
underly (comparative more underly, superlative most underly)
(dialectal) Poor; inferior.
(rare, obsolete) At a lower level.
(chiefly colloquial) In an inferior or inadequate manner; insufficiently (chiefly in opposition to overly).
underly (third-person singular simple present underlies, present participle underlying, simple past underlay, past participle underlain)
Nonstandard spelling of underlie.