godan verb (-tsu), intransitive verb
fly up; soar; rise as if dancing
Describes something, often birds, leaves, or spirits, rising into the air with a light, dancing motion. Somewhat literary.
枯れ葉が風に舞い立つ。
Dead leaves fly up in the wind.
鳥たちが一斉に舞い立った。
The birds soared up all at once.