Pl. terræ incognitæ (erron. terras incognitas). [L., = ‘unknown land.’] An unknown or unexplored region. Often fig.

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1616.  Capt. Smith, Descr. New Eng., 6. The Spaniards know … not so much as the true circumference of Terra Incognita, whose large dominions may equalize the greatnesse and goodnes of America.

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1630.  J. Taylor (Water P.), Gt. Eater Kent, Wks. I. 143/2. The place of his birth, and names of his parents are to me a meere Terra incognita.

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1756.  Lady M. W. Montagu, Lett. to C’tess of Bute, 1 April. Your provinces of politics, gallantry, and literature, all [are] terra incognita.

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1821.  Anna M. Porter, Village of Mariendorpt, II. 121. His friend and the field-marshall were nearly terras incognitas to each other.

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1901.  Scotsman, 11 March, 6/4. The country within a day’s ride … is almost a terra incognita.

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