Sea-war, white gleaming thro' the busy scud
With arching Wings, the sea-mew o'er my head
Posts on, as bent on speed, now passaging
Edges the stiffer Breeze, now, yielding, drifts,
Now floats upon the air, and sends from far
A wildly-wailing Note.
A sea-mew is a common gull, or mew gull, just to clarify what might be the one confusing part of this poem. Apart from that, it really is a simple and evocative poem. A gull winging overhead, floating upon the breeze, sometimes working against it. Anyone who has lived remotely near a coastline can picture it fairly well. The emotional content of the poem almost feels mystical or reverent, though it can change for everyone. This is Coleridge at the height of Romanticism, so I think awe at the grandeur and mystery of nature is the goal, but again, to each their own.