mem·braneBrE/ˈmembreɪn/NAmE/ˈmembreɪn/noun[C, U]athinlayerofskinortissuethatconnectsorcoverspartsinsidethebody(身体内的)膜➡ see alsomucous membraneaverythinlayerfoundinthestructureofcellsinplants(植物的)细胞膜athinlayerofmaterialusedtopreventair, liquid, etc. fromenteringaparticularpartofsth(可起防水、防风等作用的)膜状物◆awaterproofmembrane防水薄膜▸mem·bran·ousBrE/ˈmembrənəs/NAmE/ˈmembrənəs/adjective