flashback

noun

1. A dramatic device in which an earlier event is inserted into the normal chronological flow of a narrative.
2. A vivid mental image of a past trauma or other sensation that the trauma is happening in the present, especially one that recurs.
3. Something that evokes old memories; a throwback.

   “We danced fast to Martha and the Vandellas, Supremes or even the Beach Boys. Slow to Dusty Springfield or Righteous Brothers (how's that for a heavy flash back?)”

4. A similar recurrence of the effects of a hallucinogenic drug.

   “Maude Lebowski: What do you do for recreation? / The Dude: Oh, the usual. I bowl. Drive around. The occasional acid flashback.”

5. The condition of the flame propagating down the hose of an oxy-fuel welding system.
6. A query that operates against data from an earlier time, before it was changed.

   “As noted, that method provides limited support for multi-table flashbacks.”

   “[…] less used and specialized types of queries, including composite queries, hierarchical queries, version flashbacks, and parallel queries.”

verb

1. (intransitive)To undergo a flashback; to experience a vivid mental image from the past.