1. a large seine, for use generally by two boats, that is drawn around a school of fish and then closed at the bottom by means of a line passing through rings attached along the lower edge of the net.
2. a technique of fishing that utilizes a purse seine to capture large schools of fish, esp. tuna.
Pronunciation: (pûrs'sān"),[key] —v.i.,-seined, -sein•ing. to fish using a purse seine.