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We found 31 dictionaries with English definitions that include the word postmark:
Click on the first link on a line below to go directly to a page where "postmark" is defined.

General (29 matching dictionaries)

1. postmark: Merriam-Webster.com [home, info]
2. postmark: Oxford Learner's Dictionaries [home, info]
3. postmark: American Heritage Dictionary of the English Language [home, info]
4. postmark: Collins English Dictionary [home, info]
5. postmark: Vocabulary.com [home, info]
6. postmark: Macmillan Dictionary [home, info]
7. Postmark, postmark: Wordnik [home, info]
8. postmark: Cambridge Advanced Learner's Dictionary [home, info]
9. postmark: Wiktionary [home, info]
10. postmark: Webster's New World College Dictionary, 4th Ed. [home, info]
11. postmark: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. postmark: Infoplease Dictionary [home, info]
13. Postmark, postmark: Dictionary.com [home, info]
14. postmark: UltraLingua English Dictionary [home, info]
15. postmark: Cambridge Dictionary of American English [home, info]
16. Postmark: Wikipedia, the Free Encyclopedia [home, info]
17. Postmark: Online Plain Text English Dictionary [home, info]
18. postmark: Webster's Revised Unabridged, 1913 Edition [home, info]
19. postmark: Rhymezone [home, info]
20. postmark: AllWords.com Multi-Lingual Dictionary [home, info]
21. postmark: Webster's 1828 Dictionary [home, info]
22. postmark: Free Dictionary [home, info]
23. postmark: Mnemonic Dictionary [home, info]
24. postmark: WordNet 1.7 Vocabulary Helper [home, info]
25. postmark: LookWAYup Translating Dictionary/Thesaurus [home, info]
26. postmark: Dictionary/thesaurus [home, info]
27. postmark: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

28. Postmark (Pm, Pmk.): Glossary of Stamp Collecting Terms [home, info]

Computing (1 matching dictionary)

29. postmark: Encyclopedia [home, info]

(Note: See postmarks for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (postmark) ▸ noun:  a cancellation mark stamped on mail by postal officials; indicates the post office and date of mailing ▸ verb:  stamp with a postmark to indicate date and time of mailing ▸ Also see postmarks ▸ Words similar to postmark ▸ Usage examples for postmark ▸ Idioms related to postmark (New!) ▸ Popular adjectives describing postmark ▸ Words that often appear near postmark ▸ Rhymes of postmark ▸ Invented words related to postmark