In a dream it indicates joy and happiness, as long as it is not with loud guffawing or falling back onto one's back; if it is like that, it is a sign of weeping. If the laughter comes from a joke made in the dream, it indicates the joker's lack of chivalry in waking life; likewise laughter at mimicry is a sign of falling into what is forbidden. Laughter is sorrow.
(Whoever sees) that he is laughing will be given good news of a boy.
(Whoever sees) that his laughter is a smile, it is good and it is joy, and it may turn out just as he saw it.
(Whoever sees) the earth laughing, there will be plenty in that place. If you see a dead person laughing, he is in bliss in the Hereafter. Laughter is levity and frivolity, especially from people of standing, for it indicates their dismissal.