A trait is an abstract, usually numerical representation of a quality possessed by a character. The term is used in all non-d20 System White Wolf games. It is equivalent to "stat" (short for "statistic") or "characteristic" in other roleplaying games.
Most traits are rating from 1 to 5 dots, though some may be rated out of 10. The Storytelling System features some traits, like Size and derived traits like Speed, which are represented simply as numbers rather than dots.