lobster

noun

lob·​ster ˈläb-stər 

often attributive

1

: any of a family (Nephropidae and especially Homarus americanus) of large edible marine decapod crustaceans that have stalked eyes, a pair of large claws, and a long abdomen and that include species from coasts on both sides of the North Atlantic and from the Cape of Good Hope

2

: spiny lobster

lobsterlike

ˈläb-stər-ˌlīk 

adjective

Illustration of lobster

• lobster 1

Examples of lobster in a Sentence

I had lobster for dinner.

Recent Examples on the Web

The harvest or possession of egg-bearing spiny lobster, or any other egg-bearing species of lobster belonging to the families Palinuridae (spiny lobsters), Scyllaridae (slipper lobsters) or Synaxidae (furry lobsters) is prohibited. — Sarah Perkel, USA Today, 29 July 2026

Hailey just got back from freediving in Biscayne Bay and caught her first lobster. — David Goodhue, Miami Herald, 29 July 2026

The salade de homard has skimpy pieces of lobster tossed on greens with some green beans, and the steak filet is awfully small, though perfectly cooked. — Steve Forbes, Forbes.com, 28 July 2026

Framed up perfectly outside of van’s back window is the 12-foot tall, 700-pound inflatable lobster that sits atop Taste of Maine Restaurant about 35 miles up the coast from Portland. — Sarah Silbiger, CNN Money, 25 July 2026

Word History

Etymology

Middle English, from Old English loppestre, from loppe spider

First Known Use

before the 12th century, in the meaning defined at sense 1

Phrases Containing lobster

• hanging lobster claw
• lobster claw
• lobster pot
• lobster shift
• lobster thermidor
• lobster trap
• Norway lobster
• rock lobster
• spiny lobster

Rhymes for lobster

• mobster

Kids Definition

lobster

noun

lob·​ster ˈläb-stər 

: any of several large edible marine crustaceans with stalked eyes, a pair of large claws, and a long abdomen

also : spiny lobster