1. U 木材，木料　planks, boards, etc. cut from logs
2. U 杂物，破烂儿　useless things in a house

　The truck was sent to carry lumber.　卡车被派出去运木材。
　Washington annually leads the nation in lumber production.　华盛顿州每年的木材生产都居全国首位。
　Could you help me tidy the lumber room?　你能帮我整理一下杂物堆放室吗?

1. vi.笨重地行进，行动迟钝，隆隆驶过　move in a heavy or noisy way
2. vt.堆满无用的东西　fill with useless things
3. vt.〈非正〉给…增加麻烦；拖累　cause difficulty to sb, especially by giving them an unwanted object or responsibility

　lumber　用作动词作“给…增加麻烦；拖累”解时，是及物动词，属非正式英语，常与介词with连用。

　The carts lumbered along.　大车费力地前进。
　The suppliers have lumbered me with 50 cases of wine I can't sell.　供应商塞给我50箱无法销掉的葡萄酒。
　All those things are lumbered in the closet.　所有那些东西都乱糟糟地堆放在壁橱里。
　Women are lumbered with the housework.　妇女依然受到家务的拖累。