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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.

It is already investigating the regulation of wastewater pollution in Belfast Lough.

From BBC • Apr. 30, 2026

A Lough Neagh Action Plan is in place to tackle the problem of algal blooms over the course of several years.

From BBC • Apr. 19, 2026

Daera said Minister Andrew Muir "fully recognises the strength of public concern and understands the frustration many communities feel about the condition of Lough Neagh – especially those living nearby."

From BBC • Apr. 19, 2026

"Contrary to its claim, this is not the first assessment of the environmental effects of sand extraction on Lough Neagh."

From BBC • Apr. 15, 2026

Oh, Garryowen may be more gay Than this quiet man from beside Lough Neagh And I know that the sun shines softly down On the river that runs through my native town.

From "Angela's Ashes: A Memoir" by Frank McCourt

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