1) a total or partial disappearance of the light of the sun (when the moon is between it and the earth), or of the moon (when the earth's shadow falls on it) (eclipse)

2) to make the sound(s) or the noise heard when water falls on a very hot surface (hiss)

3) a gambling game in which a ball falls by chance into a numbered hole in a wheel (roulette)

4) to throw (something); to move (the head, tail etc) quickly; to throw (a coin) up to decide something according to which side it falls on (toss)