多面體 (To-biān-thé) (多面體; polyhedron) 是 (sī)佇 (tī)三次元 (sam-chhù-goân)中 (tiong),由 (iû)平面 (pêng-biān)佮 (kap)直線 (ti̍t-soàⁿ)來 (lâi)組成 (cho͘-sêng)的 (ê)幾何 (kí-hô)形體 (hêng-thé)。