play against sb 是不是和某人比赛,那这里的against具体是什么意思,

play against sb
与某人竞争,可以用与比赛
against 介词,
相反,反对,逆着,靠着,倚着
这里有对抗的意味
against
[E5^eInst,E5^enst]
prep.
相反；逆着
against the law
违法
We sailed against the wind.
我们逆风行船.
Drug taking is against the law.
吸毒是违法的.
反对
We won our match against that team.
我们在比赛中赢了那个队.
No one is against this proposal.
没有人反对这个提议.
靠着,依着
to lean against the wall
靠着墙
与…成对照
against a dark background
与黑色背景成对照
The picture looks better against the light wall.
这幅画挂在浅色的墙上显得更美.
防备；防御
against the cold
防冷
against a rainy day
防备雨天
We are all taking medicine against the flu.
我们都在服药预防流感.
以…相抵
income against expenditure
以收抵支
sb.somebody某人
sth.something某事,某物