(1)秒(钟)(sixtieth part of a minute)[C](符号为“″”)：Sixty～s make a minute. 60秒为一分钟。look at sb for a few～s向某人看了一会儿(几秒钟);run/win/complete the race in 3 minutes and 46～s 以3分46秒跑完赛程/赢得赛跑/完成竞赛;process millions of instructions per～(in a fraction of a～)每秒(瞬间)处理上百万个指令;～hand秒针;

(2)(角或度的单位)秒(measurement of an angle equal to sixtieth part of a minute)[C](符号为“″”)：an angle of 14°5′16″(fourteen degrees，five minutes and sixteen～s) 一个14度5分16秒的角;There are 3600～s(3600″)in a degree.一度为3600秒。

(3)一会儿，片刻，瞬间(brief period，moment)(BrE，infml)(缩写sec)：Please wait a～.请稍候。be ready/there/with sb in a～一会儿就好/一会儿就到那里/一会儿就与某人一起;I did not catch his meaning for a～.我一时间没弄懂他的意思。〖同〗minute，moment