intransitive. Of wind: To become ‘scant’. (But apparently here taken to mean ‘to become light’.)

To become stupid, inert, blunt, dim, etc.; to lose force, intensity, keenness, or clearness.

transferred. Of inanimate things: To move as if irresolutely or hesitatingly; to tremble, quiver. Also of a breeze: To flag.

Of the wind: to fall, drop.