英汉词典

1. 使显得必要(或正当)
    If something warrants a particular action, it makes the action seem necessary or appropriate for the circumstances.

warrant什么意思

    e.g. The allegations are serious enough to warrant an investigation...
           这些指控很严重，有必要进行一番调查。
    e.g. No matter was too small to warrant his attention.
           再小的事也会引起他的注意。