1 definition by _AtoZ_

Top Definition
An unhealthy romantic obsession with a single person. Usually accompanied by un-reciprocated affection and completely unrealistic idealization of the siad person.
John, snap out of your oneitis man. She's not into you.
by _AtoZ_ March 08, 2010

Free Daily Email

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

Emails are sent from daily@urbandictionary.com. We'll never spam you.