Definition of "immaturely" [im•ma•ture•ly]

• Giving an appearance of immaturity. (adverb)
• Without maturity. (adverb)

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• "To suggest that she should be vilified because the district decided to act so immaturely is inane."
• "Not so easy to behave immaturely when everyone knows your name, is it wilson? the Repugs have hit an all-time low, this after all the hijinks over the summer."
• "I think Hoffman made it immaturely personal and the real point was lost."