動(dong)(dong)(dong)車(che)、全稱動(dong)(dong)(dong)力車(che)輛(liang)，是(shi)指軌(gui)道交通系(xi)統(tong)中裝有(you)(you)動(dong)(dong)(dong)力裝置的(de)車(che)輛(liang)，包括(kuo)機車(che)和(he)動(dong)(dong)(dong)力車(che)廂兩大(da)類。動(dong)(dong)(dong)車(che)裝配有(you)(you)驅動(dong)(dong)(dong)車(che)輪，而與之相對應地無(wu)驅動(dong)(dong)(dong)裝置車(che)輛(liang)就是(shi)拖車(che)。列(lie)車(che)要能在軌(gui)道上正(zheng)常運行，就必須有(you)(you)動(dong)(dong)(dong)車(che)為整列(lie)火車(che)提(ti)供足夠牽引力，但可以不掛沒有(you)(you)動(dong)(dong)(dong)力的(de)拖車(che)。