/mad"lee/ , adv.
1. insanely or wildly: The old witch cackled madly.
2. with desperate haste or intensity; furiously: They worked madly to repair the bridge.
3. foolishly: They lived madly, wasting all their money.
4. extremely: They're madly in love.
[ 1175-1225; ME; see MAD, -LY ]