# backpropagation

> English word · Noun

## Definitions
1. An error correction technique used in neural networks.
2. A phenomenon in which the action potential of a neuron creates a voltage spike both at the end of the axon, as normally, and also back through to the dendrites from which much of the original input current originated.

## Etymology
From back + propagation.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/backpropagation