Vow card意思
"Vow card" is not a standard term in the English language, and it's not immediately clear what it might refer to. It could be a term from a specific game, a slang term, or a misheard/misspelled phrase. If it's a game term, it would depend on the game in question.
However, if you're looking for a definition based on the word "vow," which means a solemn promise or declaration, especially one to do something or not to do something, and "card," which can refer to a playing card or a greeting card, it's still not clear how these two words would combine to form a meaningful phrase.
If you're referring to a "vowel card," that would make more sense in the context of teaching or learning about phonics, where vowel sounds might be represented on cards for educational purposes.
If you can provide more context or specify the origin of the term, I might be able to offer a more accurate definition.