noun \ˌwil-ə-thə-ˈwisp\

: a goal that cannot be reached

: a light that sometimes appears at night over wet ground

Full Definition of WILL-O'-THE-WISP

:  ignis fatuus 1
:  a delusive or elusive goal
will–o'–the–wisp adjective

Origin of WILL-O'-THE-WISP

Will (nickname for William) + of + the + wisp
First Known Use: circa 1661


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Previous Word in the Dictionary: willock
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