1. An ensign, flag, or pennant, which floats in the wind; specifically, a long, narrow, ribbonlike flag. Brave Rupert from afar appears, Whose waving streamers the glad general knows. (Dryden)
3. A stream or column of light shooting upward from the horizon, constituting one of the forms of the aurora borealis. While overhead the North's dumb streamers shoot. (Lowell)
3. (Science: chemical) A searcher for stream tin.