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Definition of Dry eye
1. Noun. keratoconjunctivitis sicca, an eye disease caused by decreased tear production. ¹
2. Noun. (idiomatic) An eye which is not crying, i.e. someone emotionally unmoved. ¹
¹ Source: wiktionary.com
Medical Definition of Dry eye
1. A clinical condition that results from the inadequate production of tears. (27 Sep 1997)