"下午5点" 的英语表达为 "five o'clock in the afternoon"。
"five o'clock" 是表示一天中的第五个小时的时间的常用表达，"in the afternoon" 则表示在一天中的下午时间。
例句：
"I'll meet you at five o'clock in the afternoon." (我会在下午5点和你见面。)
"I usually finish work at five o'clock in the afternoon." (我通常在下午5点结束工作。)
"I'll call you back at five o'clock in the afternoon." (我会在下午5点回你电话。)