Noun: Used to refer to people that either are perceived to be able to be romantic more often than others or people that believe in some kind of scheme of live where idealized love has any meaning. Often used derogatory.
Alice: I think Bob is a romantic.
Carol: You'll never know until you try.
In general a view on love, based on novells from the 18th century which introduced the concept of love.
In current standards often outdated.
"He can be so romantic sometimes!"