Wordnet 3.0
NOUN (1)
1.
a cookout at the seashore where clams and fish and other foods are cooked--usually on heated stones covered with seaweed;
The Collaborative International Dictionary of English v.0.48:
Clambake \Clam"bake\, n.
The backing or steaming of clams on heated stones, between
layers of seaweed; hence, a picnic party, gathered on such an
occasion.
[1913 Webster]
WordNet (r) 3.0 (2006):
clambake
n 1: a cookout at the seashore where clams and fish and other
foods are cooked--usually on heated stones covered with
seaweed