负一层 Traditional form: 負一層 Pinyin (reading): fùyīcéng Definitions: (architecture) basement level 1; floor B1 Characters: 负 - load, burden; to carry, to bear 一 - one; a, an; alone 层 - layer, floor, story, stratum Traditional characters: 負 - load, burden; to carry, to bear 一 - one; a, an; alone 層 - layer, floor, story, stratum