The meaning of a dream about laughter.
There is some difference among authoritative sources, but the consensus seems to be that this should, in the main, be interpreted as a dream of contrary, unless the dreamed laughter was that of children, in which case it predicts a stroke of money luck.
Otherwise, if you were laughing in your dream, it signifies approaching unhappiness or disappointment in love, and if you heard others laughing, it portends a broken friendship.