1. very thin, translucent paper used especially for typing carbon copies
2. the thin, papery outer layer of an onion

Examples

• The secretary typed the letter on onionskin paper to make multiple copies.
• Old business documents were often printed on onionskin due to its lightweight nature.
• She peeled away the dry onionskin before chopping the onion.
• The onionskin crackled as she removed it from the bulb.
• Carbon copies required onionskin paper thin enough for the impression to show through.
• He carefully removed the papery onionskin and discarded it in the compost.
• The vintage typewriter came with a stack of yellowed onionskin paper.