[ uhn-der-lahy ]
/ ˌʌn dərˈlaɪ /
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verb (used with object), un·der·lay, un·der·lain, un·der·ly·ing.
to lie under or beneath; be situated under.
to be at the basis of; form the foundation of.
Grammar. to function as the root morpheme or original or basic form of (a derived form): The form “boy” underlies “boyish.”
Finance. to be primary to another right or security.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for underlie
/ (ˌʌndəˈlaɪ) /
verb -lies, -lying, -lay or -lain (tr)
to lie or be placed under or beneath
to be the foundation, cause, or basis ofcareful planning underlies all our decisions
finance to take priority over (another claim, liability, mortgage, etc)a first mortgage underlies a second
to be the root or stem from which (a word) is derived"happy" underlies "happiest"
Derived forms of underlieunderlier, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012