• IPA: /sweɪl/

swale (plural swales)

1. A low tract of moist or marshy land.
2. A long narrow and shallow trough between ridges on a beach, running parallel to the coastline.
3. A shallow troughlike depression that's created to carry water during rainstorms or snow melts; a drainage ditch.
4. A shallow, usually grassy depression sloping downward from a plains upland meadow or level vegetated ridgetop.
   • 1912 January, Zane Grey, chapter 6, in Riders of the Purple Sage: A Novel, New York, N.Y.; London: Harper & Brothers Publishers, OCLC 6868219 ↗:

     Jane climbed a few more paces behind him and then peeped over the ridge. Just beyond began a shallow swale that deepened and widened into a valley, and then swung to the left.

5. A shallow trough dug into the land on contour (horizontally with no slope), whose purpose is to allow water time to percolate into the soil.
   • 2009, Toby Hemenway, Gaia's Garden: A Guide to Home-Scale Permaculture, 2nd Edition, Chelsea Green Publishing (ISBN 9781603582230), page 101:

     The stored water creates an underground reservoir that aids plant growth for tens of feet below the swale. Swales also prevent gullies from forming by intercepting rainwater, slowing it, spreading it, and storing it in the soil.

• Russian: низи́на

• Portuguese: canaleta, valeta

swale (plural swales)

1. (UK, dialect) A gutter in a candle.

swale (swales, present participle swaling; past and past participle swaled)

1. Alternative form of sweal (melt and waste away, or singe)

1. A tributary of the Ure in North Yorkshire, England
2. The Swale, a channel between the Isle of Sheppey and the Kentish mainland
3. A local government district with borough status in Kent, created in 1974 with its headquarters in Sittingbourne and named after the channel