A female letter carrier, a woman who delivers mail.(noun)
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Use "postwoman" in a sentence
"Activism should be permitted to be more than solely being a postman/postwoman, or producer of literature."
"Saturday the rural route postwoman beeped the horn at the end of our driveway to alert me to a delivery, didn't wait long enough for me to get out there, and then drove off with the medication I needed to inject my horse."
"'A 'PAINFULLY' shy postwoman dressed up as a burlesque artist to raise money for needy children...."