A: something material or external that stands for or signifies something spiritual B: something indicating the presence or existence of something else (signs of success) (a sign of the times) C: PRESAGE, PORTENT (signs of an early spring)
So Hillary said to bet on the filly didn't she? Not only did it come in second, it broke down and was put down after the race. Now that's what I call a sign. Go Obama!
