diff --git a/docs/terms/index.mdx b/docs/terms/index.mdx
index 99968abf..ba6da8da 100644
--- a/docs/terms/index.mdx
+++ b/docs/terms/index.mdx
@@ -25,6 +25,9 @@ Client
 Device
 : A physical piece of hardware that utilizes the Meshtastic software and LoRa (Long Range) radio technology to create a decentralized, long-range mesh network.
 
+DFU
+: Device Firmware Update, a state which a device is placed into for it to receive a firmware update
+
 ESP32 | [Drivers](/docs/getting-started/serial-drivers/esp32/) | [Firmware](/docs/getting-started/flashing-firmware/esp32/)
 : A chipset of microcontroller made/designed by Espressif, used by a number of devices. Higher power usage than NRF52, but often cheaper and supports WiFi if desired.