fictitious

[fik-tish-uh s] /fɪkˈtɪʃ əs/
adjective
1.
created, taken, or assumed for the sake of concealment; not genuine; false:
fictitious names.
2.
of, pertaining to, or consisting of fiction; imaginatively produced or set forth; created by the imagination:
a fictitious hero.
Origin
1605-15; < Latin fictīcius artificial, equivalent to fict(us) shaped, feigned (see fiction) + -īcius -itious
Related forms
fictitiously, adverb
fictitiousness, noun
half-fictitious, adjective
half-fictitiously, adverb
half-fictitiousness, noun
nonfictitious, adjective
nonfictitiously, adverb
nonfictitiousness, noun
quasi-fictitious, adjective
quasi-fictitiously, adverb
semifictitious, adjective
unfictitious, adjective
unfictitiously, adverb
Can be confused
facetious, factious, factitious, fictional, fictitious.
factitious, fictional, fictitious, fictive.
Synonyms
1. spurious, fake. 2. fictional.
British Dictionary definitions for fictitious

fictitious

/fɪkˈtɪʃəs/
adjective
1.
not genuine or authentic; assumed; false: to give a fictitious address
2.
of, related to, or characteristic of fiction; created by the imagination
Derived Forms
fictitiously, adverb
fictitiousness, noun
Word Origin and History for fictitious
adj.

1610s, "artificial, counterfeit," from Medieval Latin fictitus, a misspelling of Latin ficticius "artificial, counterfeit," from fictus "feigned, fictitious, false," past participle of fingere (see fiction). Related: Fictitiously.