barrier n Cp DC ~ '[salmon] net set across a stream' obs (1793). In trapping seals in coastal waters, one of the three nets in a 'frame' which prevents seals from escaping out to sea.
   [1886] LLOYD 53 [The seal net] which runs parallel with the land is known as the 'barrier'; that on the right side the 'stop-net'; that on the left as the 'heave-up net.' This last-mentioned net is the special feature of the frame. The barrier and the stop-net are always kept floating in a perpendicular position by means of the ... floats; but the heave-up net is not so supported.

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