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lobster

American  
[lob-ster] / ˈlɒb stər /

noun

lobster, plural lobsters plural
  1. any of various large, edible, marine, usually dull-green, stalk-eyed decapod crustaceans of the family Homaridae, especially of the genus Homarus, having large, asymmetrical pincers on the first pair of legs, one used for crushing and the other for cutting and tearing: the shell turns bright red when cooked.

  2. spiny lobster.

  3. any of various similar crustaceans, as certain crayfishes.

  4. the edible meat of these animals.


lobster British  
/ ˈlɒbstə /

noun

  1. any of several large marine decapod crustaceans of the genus Homarus, esp H. vulgaris, occurring on rocky shores and having the first pair of limbs modified as large pincers

  2. any of several similar crustaceans, esp the spiny lobster

  3. the flesh of any of these crustaceans, eaten as a delicacy

"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

Other Word Forms

Etymology

Origin of lobster

before 1000; Middle English lopster, Old English loppestre literally, spidery creature ( loppe spider ( see lob 1) + -stre -ster ); cf. lop 1

Explanation

A lobster is a hard-shelled animal that lives in salt water and has two big front claws, or pincers. People who are familiar with red cooked lobsters might be surprised to see that when they're alive they are brown, gray, or even blue. Lobsters are large crustaceans, which means they're related to shrimp, crabs, crawfish, and even barnacles. They live and feed on the bottom of the ocean, crawling on their ten legs and eating fish, worms, and sea plants. As a food, lobster is considered a delicacy today — although before the mid-19th century, it was thought of as food for poor people and prisoners in coastal New England.

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Vocabulary lists containing lobster

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.

To help contain costs, Red Lobster limited the offer to dine-in guests only.

From The Wall Street Journal • May 15, 2026

After months of planning and internal debate, Red Lobster executives believe they have cracked the code on Endless Shrimp.

From The Wall Street Journal • May 15, 2026

Visits to Red Lobster locations jumped by more than 18% in the weeks since Endless Shrimp began, according to year-over-year comparisons by location data firm Placer.ai.

From The Wall Street Journal • May 15, 2026

Lobster and caviar rolls sit next to five-cheese pizza rolls.

From Salon • Apr. 25, 2026

At Red Lobster after his second heart attack, Green would order chicken and Wilson would have salmon—plus a side order of fried shrimp.

From "Class Matters" by The New York Times

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