Top Definition
The belief that because one thinks a certain thought often, or in worst-case scenario, more than once, that this thought is then absolutely true.
The think tank moved its office without telling her because her chronic assumption neurosis had become so irritating.
by Teech2 October 01, 2009
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.