NOUN (1)

1. a fractional monetary unit of Japan and Indonesia and Cambodia; equal to one hundredth of a yen or rupiah or riel;

The Collaborative International Dictionary of English v.0.48:

Sen \Sen\, n.
   A Japanese coin, worth about one half of a cent.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sen \Sen\, adv., prep., & conj. [See Since.]
   Since. [Obs.]
   [1913 Webster]