n.[C]

1. 薄酥饼；威化饼
2. 【宗】（天主教做弥撒时用的）圣饼
3. 封信条，封缄纸
4. 【电】晶圆；薄片；圆片；晶片
5. （用于包药以便吞服的）糯米纸

vt.

1. （用封信条）封（信封等）

n.

1. a thin, light, crisp sweet biscuit.
2. a thin disc of unleavened bread used in the Eucharist.
3. a disc of red paper stuck on a legal document as a seal.
   ▸historical a small disc of dried paste formerly used for fastening letters or holding papers together.
4. Electronics  a very thin slice of a semiconductor crystal used as the substrate for solid-state circuitry.