folklore
background information about the fictional(= invented) characters in a book, film, computer game, etc. and the fictional place and situation in which its events happen that is accepted as true by its fans(= people who are very enthusiastic about something and like to write or talk about it):
There are alternate takes on the lore of the World of Warcraft.
If you are a hardcore Tolkien lore fan, you will find this information surprising.

SMART Vocabulary: related words and phrases

Accounts and stories
anecdote
another
anti-narrative
backstory
be another storyidiom
bodice-ripper
cautionary tale
horror story
in medias res
kompromat
legend
legendary
misdescription
rundown
running commentaryphrase
scenario
semi-legendary
shaggy-dog story
strand
write something up

You can also find related words, phrases, and synonyms in the topics:

Information and messages

lore | American Dictionary

lore
noun[ U ]
us/lɔr, loʊr/
knowledge and stories, usually traditional, about a subject:
He published several books on Indian lore and hunting.

Examples of lore

lore
What he is saying, then, is not a piece of antiquarian's lore, but an account of contemporary practice.
The implication is clear - oral lore is dynamic, and we cannot presume that it correctly communicates the facts of history without additional confirmation.
In contrast, clinical lore has become a dimension of received wisdom through which research knowledge is filtered.
This book is an extremely useful addition to astrobiology lore.
And yet runic lore may be in play in this passage only partially rather than crucially.
Local lore, shared stories, inside jokes, knowing laughter.
As in other institutional situations, a corporate culture nurtured the lore of the milieu.
The only runic lore that is required to solve these puzzles is a knowledge of which runes correspond to which roman letters.
Overall, the comparative magnitude of the party coefficients conforms to general lore about the varying weight of these attachments in this particular contest.
It is one of the mysteries of marketing lore.
According to contemporary philosophical lore, counterpossibles - that is, counterfactual conditionals with impossible antecedents - are one and all trivially true.
Through contact with the spiritual world and social and cultural lore, individuals come to understand and develop harmonious social relations.
The capabilities of decision-assist programs are exciting and appear to be a tangible step toward the cybermedicine of science fiction lore.
This textbook amply supplies both, and is careful to separate clinical lore from the results of randomized clinical trials.
Patients coming to a psychodynamically oriented therapist or to an exorcist are not supposed to be well-versed in object-relations theory or demonic lore, respectively.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.