iceberg
Americannoun
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a large floating mass of ice, detached from a glacier and carried out to sea.
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Informal. an emotionally cold person.
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Australian Informal. a person who swims or surfs regularly in winter.
idioms
noun
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a large mass of ice floating in the sea, esp a mass that has broken off a polar glacier
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the small visible part of something, esp a problem or difficulty, that is much larger
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slang a person considered to have a cold or reserved manner
Discover More
Most of the ice in an iceberg is underwater, leaving only the “tip of the iceberg” visible — a fact that is often alluded to in discussions of subjects in which the most important aspects are hidden from view.
Other Word Forms
Noun Inflected Forms
Etymology
Origin of iceberg
1765–75; half Anglicization, half adoption of Dutch ijsberg ice mountain; cognate with German Eisberg, Swedish isberg
Explanation
An iceberg is a huge chunk of ice that breaks off of a glacier and floats around the ocean. Most of an iceberg is under water and can't be seen; that's how a sneaky iceberg managed to sink the Titanic. Icebergs exist in the coldest waters on the planet — the largest icebergs ever observed have been in Antarctica. An iceberg is blamed in the famous sinking of the Titanic in 1912, and the disaster inspired a new system for tracking and measuring icebergs. Another kind of iceberg is the lettuce, which is crisp and nearly as pale as an actual iceberg. The colloquial "tip of the iceberg" means the smallest hint of a much larger problem.
Vocabulary lists containing iceberg
Physical Geography - Introductory
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Physical Geography - Middle School
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Physical Geography - High School
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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:
They regard that figure as "the tip of the iceberg" and believe around 10-15% of season tickets are controlled by touts.
From BBC ● Jul. 21, 2026
Late last week, Taylor Farms said it would recall iceberg lettuce grown and processed at a farm in Guanajuato, in central Mexico.
From MarketWatch ● Jul. 20, 2026
A majority of products on the company’s recall list are items sold to restaurants and retailers including chopped lettuce, shredded lettuce, blends of iceberg and romaine lettuce, and salad mixes.
From Los Angeles Times ● Jul. 20, 2026
It also includes Marketside-branded iceberg lettuce sold at Walmart locations in 15 states, according to the FDA.
From BBC ● Jul. 19, 2026
Shackleton scratched a match alight with his thumbnail, then lit a cigarette as the rogue iceberg blundered toward them.
From "Shipwreck at the Bottom of the World" by Jennifer Armstrong
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I instead recall coasting past a flotilla of icebergs in Alaska’s Glacier Bay.
From Los Angeles Times ● Jul. 8, 2026
If retreat continues, glaciers and icebergs could erode weathered rock layers more rapidly.
From Science Daily ● Feb. 4, 2026
And because he is the centerpiece of the show, I rely on Noah a lot for guidance and help figuring out how to steer through all the icebergs.
From Los Angeles Times ● Jan. 8, 2026
But beneath the smooth-sailing surface, the icebergs are still there.
From BBC ● Dec. 24, 2025
The little black Adélies, with a shocking white ring around their eyes, made a comical sight for the crew as they tobogganed off the icebergs into the water.
From "Shipwreck at the Bottom of the World" by Jennifer Armstrong
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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.