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Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.

Search results for 'clam':

clam noun 1 a any of various bivalve shellfish; b its edible flesh. 2 colloq an uncommunicative person. verb (clammed, clamming) intrans, chiefly US to gather clams.
ETYMOLOGY: 16c: a shortening of clamshell a shell which clamps (see clamp1).

clam up colloq 1 to stop talking suddenly. 2 to refuse to speak or answer questions, etc.