noun
A crustacean of the Nephropidae family, dark green or blue-black in colour turning bright red when cooked, with a hard shell and claws, which is used as a seafood.
Various other crustaceans that resemble true lobsters:
(slang, historical) A soldier or officer of the imperial British Army (due to their red or scarlet uniform).
(slang) An Australian twenty-dollar note, due to its reddish-orange colour.
verb
To fish for lobsters.
adjective
Red-colored, especially from a sunburn.