Lie (3)
'lie' is the definition.
(I know that fib is a more specific form of the action lie)
This is all the clue.
(Other definitions for fib that I've seen before include "One must be 20 [UNTRUE]" , "Story" , "minor piece of fiction" , "A harmless white lie" , "Little white lie" .)
'lie' is the definition.
(an untruth is a lie)
This is all the clue.
(Other definitions for untruth that I've seen before include "product of Orwell's ministry?" , "Fiction" , "story" , "A genuinely deniable" , "A lie or false statement" .)
'lie' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for falsehood that I've seen before include "Untruth" , "Deception" , "Has fooled with lie" , "Fictional account" , "work of fiction" .)