落伍luò∥wǔ 1.掉队{fall behind the ranks; straggle; drop behind; drop out}: 他不愿～,一脚高一脚低地紧跟着走。{Not wanting to be left back, he staggered along closely behind.} 2.〈比喻fig.〉人或事物跟不上时代{(of a person or a thing) out of date; behind the times; backward}: 产品设计～。{The design of the product is out of date.}