Lumber \Lum"ber\, v. t. [imp. & p. p. {Lumbered}; p. pr. & vb. n. {Lumbering}.] 1. To heap together in disorder. " Stuff lumbered together." --Rymer. [1913 Webster] 2. To fill or encumber with lumber; as, to lumber up a room. [1913 Webster]