The noun suitor is an old fashioned word for a somewhat old fashioned kind of person: a man who woos or courts a woman. If a boy serenades you from below your bedroom window, he is your suitor, especially if he hopes to marry you one day. In the fourteenth century, a suitor was a fan or follower — the romantic meaning came along almost two hundred years later. The root is the Latin word sequi, "to attend or follow."