a sudden strong wind
His hat was blown off by a sudden gust (of wind).
Today's weather will be windy, with gusts of up to 40 miles per hour.
— often used figuratively
gusts of laughter
a gust of emotion
— gustiness /ˈgʌstinəs/ noun [noncount]
the gustiness of the winds
— gusty /ˈgʌsti/ adjective gustier; gustiest
a gusty day