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4.
an individual who dates only one person at a time (and is faithful to them at that time)
Tara is not a player but she is a serial monogamist.

Tom is never flippant with women; he claims to be only a serial monogamist.
by Vickidee April 10, 2011
 
1.
function: noun

one who spends as little time as possible being single, moving from the end of one relationship to the beginning of a new relationship as quickly as possible

although the relationships in which many serial monogamists find themselves are also often short lived, the defining aspect of serial monogamy is the desire and ability to enter new relationships very quickly, thus abbreviating any period of single life during which the serial monogamist may begin to ask questions of an existential nature
Percy: Wow, I can't believe Gwyvron is already dating someone else! I thought he just broke up with Lorelai at last week's LARP after she accidentally cut off his phonytail...

Stewart: Yeah, that's the way it's always been. When he broke up with me, he started dating that hussy Lorelai within three days. He pursued her as if he were Cerberus hunting a soul fleeing across the Euphrates. I'll tell you, that Gwyvron is quite the serial monogamist.
by Elliott October 25, 2005
 
2.
A descriptor for a person who has commitment issues but does not engage in cheating or infidelity. A serial monogamist likes the emotional and physical intimacy of relationships and therefore seeks partners who want a longterm romantic relationship. A serial monogamist may or may not warn their partner about their fear of commitment. (Often the partners foolishly believe they will be able to change this about the serial monogamist.)

The relationship may be short-lived or it may last a few months to years, however the serial monogamist is always holding back and if the other partner in the romance pushes at all, the serial monogamist will end the relationship swiftly and often without emotion.
Serial monogamist: I broke up with my boyfriend.

Friend: What???? You guys have been together for three years!

Serial monogamist: I know... I really liked him.

Friend: What happened?

Serial monogamist: He asked me to marry him.

Friend: You're such a serial monogamist!
by Word Vixen November 29, 2009
 
3.
A person who can't stand not being with someone and so goes headlong from one relationship to another without any break in between.
Look at her over there, only broke up with her ex last week and is already going out with someone else. She is such a serial monogamist.
by Golden3232 January 03, 2010
 
5.
A man or woman who as extremely short-term relationships because they seem to like to put others in pain or because their parents messed them up in childhood
See: 35% women
99.999% men
by Butterfly December 15, 2003