1. also la·sa·gne (lə-zänyə) Pasta in flat, very wide strips.
2. A dish made by baking such pasta with layers of sauce and fillings such as cheese or meat.
[Italian, a flat, wide piece of pasta, possibly from Vulgar Latin *lasania, dish cooked in a vessel like a chamber pot, noodle dish (perhaps influenced by Latin laganum, thin flat sheet of dough), from Latin lasanum, chamber pot, from Greek lasanon, tripod, chamber pot, of unknown origin.]
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Indo-European & Semitic Roots Appendices
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