We found one dictionary that defines the word unimproved values:

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1. unimproved values: Collins English Dictionary

▸ Words similar to unimproved values ▸ Usage examples for unimproved values ▸ Idioms related to unimproved values ▸ Wikipedia articles (New!) ▸ Words that often appear near unimproved values ▸ Rhymes of unimproved values ▸ Invented words related to unimproved values