Source : Webster's Revised Unabridged Dictionary (1913)

Clam \Clam\ (cl[a^]m), v. t. [imp. & p. p. {Clammed}; p. pr. &
   vb. n. {Clamming}.] [Cf. AS. cl[ae]man to clam, smear; akin
   to Icel. kleima to smear, OHG. kleimjan, chleimen, to defile,
   or E. clammy.]
   To clog, as with glutinous or viscous matter.

         A swarm of wasps got into a honey pot, and there they
         cloyed and clammed Themselves till there was no getting
         out again.                               --L'Estrange.

Source : WordNet®

clamming
     See {clam}

clam
     v : gather clams, by digging in the sand by the ocean
     [also: {clamming}, {clammed}]

clam
     n 1: burrowing marine mollusk living on sand or mud
     2: a piece of paper money worth one dollar [syn: {dollar}, {dollar
        bill}, {one dollar bill}, {buck}]
     3: flesh of either hard-shell or soft-shell clams
     [also: {clamming}, {clammed}]