Laughing / Laughter dream meaning is explained below using 1 different source. Each interpretation is shown with its source.

Interpretation 1 — James R. Lewis and Evelyn Dorothy Oliver

Laughing in a dream often has the same meaning as it does in ordinary life: namely, taking something lightly or putting others at ease. Alternatively, a dream laugh can be alluding to one of many idioms, from “have the last laugh” to “laughing all the way to the bank.”
Source: Dream Symbols in The Dream Encyclopedia Author: James R. Lewis and Evelyn Dorothy Oliver