An afterburner is an addition to a jet engine that increases top speed.

Afterburner can also refer to:

• Afterburner (Transformers), several fictional characters
• Afterburner (album), an album by ZZ Top
• Afterburner (modification kit), an aftermarket frontlighting kit for Game Boy Advance
• Afterburner wireless 125 High Speed Mode, an enhancement to the IEEE 802.11g wireless networking standard
• After Burner, a flight combat video game
• Excess post-exercise oxygen consumption, a post-workout body effect also known as the afterburner effect

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