noun
old leaf; old leaves
Archaic noun for a leaf or leaves that have aged or fallen. Not used in modern everyday speech; encountered mainly in classical literature or poetry.
古葉が風に舞うさまを詠んだ古歌がある。
There is an old poem that describes old leaves dancing in the wind.
落ち葉 is the common modern word for fallen leaves, while 古葉 is archaic and rarely used.
Compound of 古 (old) and 葉 (leaf). The reading ふるば is a rendaku form of ふるは.