1.年長的   adj.

Charles is seven years senior to me.

查理斯比我大七歲。

2.年資較深的 adj.

She is a senior member of the education committee in our club.

她是我們俱樂部教育委員會中的資深委員。

3.學長 n.

Jessie was my senior at National Taiwan Normal University by three years.

潔西是台灣師大比我高三屆的學長。