noun
plural clams
[count] :a type of shellfish that lives in sand or mud, has a light-colored shell with two parts, and is eaten both cooked and raw
see color picture
clams [plural] US slang somewhat old-fashioned :dollars
(as) happy as a clam
US informal :very happy
verb
clams; clammed; clamming
clam up
[phrasal verb] informal :to stop talking
US