Definition of wafer

What does the word wafer mean?

• part of speech: noun, transitive verb

  Kind of very thin sweet honey comb-faced biscuit now chiefly eaten with ices (thin as a w., whence wafery a.); thin disk of unleavened bread used in Eucharist; small disk of dried paste formerly used for fastening letters, holding papers together, &c.; (vb) attach or seal with w. [old French]