US /ˌʌn.dɚˈlaɪ/ UK /ˌʌn.dəˈlaɪ/
verb Freq #146219

Meanings

  1. 1
    verb

    to lie beneath something

    Layers of clay underlie the field.

  2. 2
    verb

    to be the hidden basis or cause of something

    A simple assumption underlies the whole theory.

Thesaurus

Synonyms
1 verb · to lie beneath something lie undersit beneath
2 verb · to be the hidden basis or... underpinsupportground
More subtend
Opposites
overlie
Word family
Derived forms underlainunderlayunderliesunderlying
Related forms underlying

Etymology

From Middle English underlien, underliggen, from Old English underliċġan ("to underlie"), equivalent to under + lie.

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Topics

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