Definition of "thoughtlessness" [thoughtlessness]

• Disregard for other's feelings (noun)
• Heedless disregard for the consequences of one's actions (noun)

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• "Our human greed and thoughtlessness is creating a lot of human suffering that gets swept under the rug."
• "How necessary to youth and thoughtlessness is the wisdom of experience! '"
• "And the notion of thoughtlessness acquires an added sting."