1. Possession; the act of taking possession; the thing possessed.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• seasin,
• sesin,
• seison,
• Cesin,
• sejsin,
• se9sin,
• seiein,
• seiwin,
• seisun,
• seis9n,
• seisim,
• sxeisin,
• seeisin,
• s4eisin,
• seiusin,
• sejisin,
• seijsin,
• sekisin,
• seiosin,
• se9isin

The plural of the "Seisin" can be the "seisins".

The singular of the "Seisin" can be the "Seisin".