figment

[ fig-muh nt ]
/ ˈfɪg mənt /

noun

a mere product of mental invention; a fantastic notion: The noises in the attic were just a figment of his imagination.
a feigned, invented, or imagined story, theory, etc.: biographical and historical figments.

Origin of figment

1400–50; late Middle English < Latin figmentum something made or feigned, equivalent to fig- (base of fingere to mold, feign) + -mentum -ment
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British Dictionary definitions for figment

figment

/ (ˈfɪɡmənt) /

noun

a fantastic notion, invention, or fabricationa figment of the imagination

Word Origin for figment

C15: from Late Latin figmentum a fiction, from Latin fingere to shape
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