Meaning of wafer

wa•fer

Pronunciation: (wā'fur), [key]
— n.
  1. a thin, crisp cake or biscuit, often sweetened and flavored.
  2. a thin disk of unleavened bread, used in the Eucharist, as in the Roman Catholic Church.
  3. a thin disk of dried paste, gelatin, adhesive paper, or the like, used for sealing letters, attaching papers, etc.
  4. a thin sheet of dry paste or the like, used to enclose a powder to be swallowed.
  5. any small, thin disk, as a washer or piece of insulation.
  6. a thin slice of semiconductor used as a base material on which single transistors or integrated-circuit components are formed.
—v.t.
  1. to seal, close, or attach by means of a wafer or wafers: to wafer a letter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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