We found one dictionary that defines the word without thinking:

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1. without thinking: Rhymezone

Definitions from WordNet (without thinking) ▸ adverb:  in a stupid manner Opposite: deliberately, thoughtfully, intentionally Phrases: doing something without thinking, act without thinking, to do without thinking, speak without thinking, acting without thinking, more... ▸ Words similar to without thinking ▸ Usage examples for without thinking ▸ Idioms related to without thinking ▸ Wikipedia articles (New!) ▸ Words that often appear near without thinking ▸ Rhymes of without thinking ▸ Invented words related to without thinking