Top Definition
The desired result of completely sealing something up.

Usually the result of the act of clothing oneself against the elements, commonly seen at UK festivals when festival-goers wear head-to-toe waterproof gear. It is often the case that a successfully sealed unit only occurs when an all-in-one waterproof suit has been used as the sealing agent.
Chrissy: I am definitely damp inside my waterproof jacket and trousers and it's not from trying to pee in a cup to save me going to the portaloos. My sealed unit is compromised.
Mark: I am a completely sealed unit in my all-in-one.
by Tee Elle See August 05, 2011

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