lighthouse

Etymology

It is a compound from English light + house.^{[2][3][4][5][6]} The OED compares the earlier firehouse and light tower in the same sense.^[2]

Earliest recorded meaning

A coastal tower or other structure with a strong light at the top, originally a beacon, to warn or guide ships: 1606, in a Mariners' Charter quoted in Brand's history of Newcastle.^[2][7] Merriam-Webster dates the first known use to 1622 and Etymonline to the 1620s,^[8][4] and Dictionary.com to 1655–65.^[5]

Semantic evolution

The meaning has stayed close to the first one.^[2][8] Johnson (1755) described a lighthouse as a high building with lights hung at the top to guide ships at sea, and quoted Arbuthnot, who used it beside the older word pharos.^[6] Slang gave the word several figurative senses: a watch-house (about 1786), a large red nose or a man with one (1811), and in American tramps' slang of 1899 a lookout who knew every local detective by sight.^[9]

Timeline

• 1606 – a tower with a light to guide ships.^[2]
• 1622 – first known use, according to Merriam-Webster.^[8]
• c. 1786 – in slang, a watch-house.^[9]
• 1811 – in slang, a red, fiery nose.^[9]
• 1899 – in American slang, a lookout.^[9]

Meanings

Noun

1. A tower or other building on a coast or offshore with a powerful light at the top that warns or guides ships at sea: The old lighthouse on the point is now a museum.^{[8][10][2][11]}

Word family

• lighthouse tube

Related words

• light
• house
• lightship

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
4. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ a b Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
7. ^ Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)
8. ^ a b c d Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
9. ^ a b c d Green, Jonathon (2010), Green's Dictionary of Slang, London: Chambers; digital ed. 2016–, https://greensdictofslang.com
10. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
11. ^ Soanes, Catherine; Stevenson, Angus, eds. (2004), Concise Oxford English Dictionary, 11th ed., Oxford: Oxford University Press