postmark
US
UK postmark n: (mark stamped on mail)
SC 邮戳 yóu chuō
David received a letter that had a postmark from Georgia.
postmark [sth] vtr: (stamp: posted mail)
SC 给…盖邮戳 gěi gài yóu chuō
I took my letter to the post office where the clerk postmarked it and mailed it.