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lough

American  
[lok, lokh] / lɒk, lɒx /

noun

Irish English.
  1. a lake.

  2. a partially landlocked or protected bay; a narrow arm of the sea.


lough British  
/ lɒx, lɒk /

noun

  1. an Irish word for lake 1

  2. a long narrow bay or arm of the sea in Ireland

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of lough

1505–15; Anglo-Irish spelling of Irish loch lake; compare Middle English low, lough ( e ), logh ( e ), Old English (Northumbrian) lūh < British Celtic *lux- (> Welsh llwch (obsolete) lake, Old Breton luh, Breton louc’h ), apparently < early Irish; see loch

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The lough has been blighted by potentially toxic blue-green algal blooms since 2023, due to pollution primarily from agriculture and wastewater.

From BBC Jun. 27, 2026

Muir said the crisis "has been decades in the making" and whilst there are "no quick fixes, restoring and protecting the ecological health of the lough is possible".

From BBC Apr. 19, 2026

"The aim is to give a voice to the lough and come together as a community to highlight through song, how we feel about the Lough," she explained.

From BBC Apr. 19, 2026

Scientists have previously analysed the lough bed and found deep scarring.

From BBC Apr. 15, 2026

Hope in the fact that he could learn and survive and take care of himself. lough hope, he thought that night.

From "Hatchet" by Gary Paulsen

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