Outbursts of laughter
I believe the answer is:
gales
'outbursts of laughter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gales that I've seen before include "They're force 7 to 10 on the Beaufort scale" , "Tempests and squalls" , "Weather conditions" , "Force 7 to 10 winds" , "High winds" .)