Definition Proper noun 1. Iowa : A state located in the Midwestern region of the United States of America. 'IA' is its official two-letter postal abbreviation. Usage 'IA' is primarily used in formal, written contexts to represent the state of Iowa, especially in addresses, data tables, and official documentation. Example: "Please mail the package to Des Moines, IA 50309." Example: "The shipping...

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