Definition of "saugh"

There are a very great many kinds of saugh, or willow tree, and Holland is said to be the native place, and great nursery of them

1836, Robert Monteath, The Forester's Guide and Profitable Planter, Etc. Third Edition‎

After that we have cutte our wilfes and saughs […]

1857, Rural Economy in Yorkshire in 1641‎

There are some parts of Scotland where it would be impossible to find a saugh for miles that had not a grassy mound before it, telling a bloody tale.

2021, Nancy Mitford, Highland Fling

By Morgany doe drive her through her watry saugh (marginal gloss) A kind of Trench.

1612, Michael Drayton, Poly-Olbion, song 4 p. 59

The nest, which is composed of dry bents lined with hair, is generally built close to the ground, among rank vegetation or rushes, but I have sometimes found it in low willow bushes in a saugh bog.

1889, George Muirhead, The Birds of Berwickshire, page 188

oo the lambies bleat an' play owre the green and grassy haugh, An' in wayward gambols stray doon the burn beside the saugh;

1897, Alan Reid, The Bards of Angus and the Mearns, page 83