postmark

postmark
noun
  1. an official mark stamped on a letter or other postal package, giving the place, date, and time of posting, and serving to cancel the postage stamp
    邮戳
    the package had a York postmark.
    这个包裹上有约克郡的邮戳。
verb
  1. [with obj.](一般作 be postmarked)stamp (a letter or other postal package) officially with such a mark
    在…上盖邮戳
    [with obj. and complement]the letter was postmarked New York.
    这封信上盖有纽约的邮戳。
英语宝典
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