1. (TV, fiction, etc) new information that explains or changes the interpretation of a previous event
   "The show's writers used a retcon to explain the character's sudden disappearance"

1. Revise retrospectively, e.g. to attach a new perspective or significance
   "The comic series retconned the hero's origin story to include a secret mentor"

Derived forms: retcons, retconned, retconning

Encyclopedia: Retcon