first /fə:st/ I. num. (1st) 1.第一 (作定语)：Let’s begin with the first lesson.我们从第一课开始。 She was the first woman to fly across the Atlantic.她是第一个飞过大西洋的妇女。2.头几个: For the first few days the men passed him without greeting. 开始的几天，那几个人走过他旁边时也不打招呼。 ‖II.adv.1.第一：Who came first in the race?比赛中谁跑了第一? 2.首次：When did you first meet her?你初次见到她是什么时候? ‖III. n.sing.1. 开端，开始：Things went wrong from the first.事情开始就出了差错。2. 第一名，冠军：She has taken a first. 她得了第一名。IV. pron.(无pl.形式)第一名，第一个：He is always the first to come and the last to leave. 他总是第一个到，最后一个离开。at first 起先，开始：At first he didn’t know what to do. 开始他不知道该怎么办。first of all 首先，第一：First of all, let me introduce Mr.Smith to you. 首先，我给你们介绍一下史密斯先生。