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From The Collaborative International Dictionary of English v.0.48:
Upturn \Up*turn"\, v. t. To turn up; to direct upward; to throw up; as, to upturn the ground in plowing. "A sea of upturned faces." --D. Webster. [1913 Webster] So scented the grim feature, and upturned His nostril wide into the murky air. --Milton. [1913 Webster]