Definition of "breeches"

And how then was the Devil drest? / Oh! he was in his Sunday's best: / His jacket was red and his breeches were blue, / And there was a hole where the tail came through.

1834 , Samuel Taylor Coleridge, Robert Southey, “The Devil's Thoughts”, in The Poetical Works of S. T. Coleridge, volume II, London: W. Pickering, page 83