Top definition
A spell cast in D&D to show the passage of time. A joke the GM can make.
The GM waves his hand across the air and says, "I cast handwavium...it's tomorrow."
by 403forbidden April 27, 2008
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
2
a term used when a science fiction writer "waves his hands" at reality and hard science for the sake of the plot. Refers to all unrealistic or impossible technology, such as faster-than-light travel, teleportation, artificial gravity, etc.

Handwavium is extensively used in movies, more so than in literature, due to the need to mass market movies to a scientifically ignorant public and because filming realistic space travel is relatively expensive.
Star Trek is fun, but it's loaded with handwavium.

Armageddon sucked for many reasons, one of which was overuse of handwavium.

Apollo 13 didn't have any handwavium tech, it was all historically accurate hardware.
by Jack Ape April 30, 2009
Mug icon

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the shirt