1.第一的；最初的；最早的；最先的；首要的
2.初次的
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1.第一；最初；最先
2.先；首先
3.第一次；首次
4.（用於列举事项）第一，首先
5.宁愿；宁可
6.at first 起初；当初
可数名词：
1.【口】（以前从未有过的）显着成就﹑ 事件等
2.【英】first (in sth)（大学学位的）最高成绩，优等
不可数名词：
1.（提到的或出现的）第一个人或事物
2.（汽车, 自行车等的）最低档
3. from the (very) first 一开始 英语解释
- before another in time, space, or importance
- before anything else
- prominently forward
- indicating the beginning unit in a series
- serving to begin
- the first or highest in an ordering or series
- being the gear producing the lowest drive speed
- the first element in a countable series
- the fielding position of the player on a baseball team who is stationed at first of the bases in the infield (counting counterclockwise from home plate)
- the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving
- the initial time
- preceding all others in time or space or degree
- ranking above all others
- serving to set in motion
- the time at which something is supposed to begin
- an honours degree of the highest class
- highest in pitch or chief among parts or voices or instruments or orchestra sections