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  • firth
    firth
    noun
    a long, narrow indentation of the seacoast.
  • Firth
    Firth
    noun
    John Rupert, 1890–1960, English linguist.
Synonyms

firth

1 American  
[furth] / fɜrθ /
Also frith

noun

Chiefly Scot.

  1. a long, narrow indentation of the seacoast.

Firth 2 American  
[furth] / fɜrθ /

noun

  1. John Rupert, 1890–1960, English linguist.

firth British  
/ fɜːθ /

noun

  1. a relatively narrow inlet of the sea, esp in Scotland

"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
firth Scientific  
/ fûrth /

  1. A long, narrow inlet of the sea. Firths are usually the lower part of an estuary, but are sometimes fjords.

Other Word Forms

Etymology

Origin of firth

First recorded in 1400–50; late Middle English ( Scots ), from Old Norse firth-, stem of fjǫrthr “fjord”

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.

“This was a huge counterparty to a number of big banks who seem to have absolutely no idea what was going on,” said Edward Firth, a banking analyst at KBW in London.

From The Wall Street Journal • May 6, 2026

Firth, for instance, but mostly this is a book unencumbered by visible scholarship.

From The Wall Street Journal • Mar. 11, 2026

Colin Firth plays Sir Bucephalus Hodge, a bigwig whose exact credentials escape me, but who’s giving the university a new science building.

From Los Angeles Times • Mar. 3, 2026

Chris wrongly predicted a 1-1 draw but his guest, Embrace bassist Steve Firth, correctly backed United to win 1-0 - and those 10 points handed him the weekly win.

From BBC • Feb. 26, 2026

Jason, because he’s handsome in a British film star kind of way, not a Depp or a Pitt, but a Firth, or a Jason Isaacs.

From "The Girl on the Train" by Paula Hawkins

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.