| 1. | lacking in consideration for others; inconsiderate; tactless: a thoughtless remark. |
| 2. | characterized by or showing lack of thought: a shallow, thoughtless book. |
| 3. | not thinking enough; careless or heedless: thoughtless of his health. |
| 4. | devoid of or lacking capacity for thought. |
thought·less (thôt'lĭs) adj.
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