Stun, STUN, or stunning may refer to:

• Beauty, or something that provides pleasure
• Surprise (emotion), felt after an unexpected event

• Unconsciousness, or not being conscious
  • Stunning, a method of rendering animals unconscious

• STUN, a computer network protocol and methods

• Stunnin', a 2020 song by Curtis Waters and Harm Franklin
• The Stunning, an Irish rock band
• Stun (Bloody Roar), a character in the Bloody Roar video game series
• Stun shot, in cue sports
• S.T.U.N. (band), an American punk band

• Stunner (disambiguation)