preemptive

a. 先买的, 先买权的, 有先买权的
【法】 有优先购买权的, 优先购买的, 先发制人的

副词:preemptively 异体字:pre-emptive 

preemptive 或 pre-emp.tive

adj.（形容词）
Of, relating to, or characteristic of preemption.
先买（占）的：先买（占）的、关于先买（占）的或以先买（占）为特点的
Having or granted by the right of preemption.
有先买（占）权的或被授于先买（占）权的


Relating to or constituting a military strike made so as to gain the advantage when an enemy strike is believed to be imminent:
先发制人的：关于或构成为了胜过将临的敌方攻击而进行的军事打击的：
例句：
a preemptive nuclear attack.
先发制人的核袭击

Undertaken or initiated to deter or prevent an anticipated, usually unpleasant situation or occurrence:
先发制人的：为延缓或阻止预期的，经常是不愉快的状况或事件而做出的或先做的：
例句：
The two companies organized a preemptive alliance against a possible takeover by another firm.
这两个公司组成了先发制人的同盟以防备可能被另一个公司接管

Having or marked by the power to preempt or take precedence:
优先的：有先占或优先权的或以先占或优先为特点的：
例句：
a preemptive business offer; preemptive authority.
优先出卖；先买权

Games Relating to or being a bid in bridge that is unnecessarily high and is intended to prevent the opposing players from bidding.
【游戏】 先发制人的，尽量叫大牌的：桥牌叫出高得没有必要的牌以阻止对手叫牌

【引伸】
preemp.tively
adv.（副词）