vis·i·bil·i·ty (v?z??-b?l??-t?)n. pl. vis·i·bil·i·ties 1. The fact, state, or degree of being visible.2. The greatest distance under given weather conditions to which it is possible to see without instrumental assistance.3. a. The capability of being easily observed: an executive with high visibility.b. The capability of providing a clear, unobstructed view: a windshield with good visibility.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.visibility (?v?z??b?l?t?) n1. the condition or fact of being visible2. clarity of vision or relative possibility of seeing3. the range of vision: visibility is 500 yards. Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014vis?i?bil?i?ty (?v?z ??b?l ? ti) n. 1. the quality, state, or fact of being visible. 2. the greatest distance it is possible to see under given atmospheric conditions. 3. the relative capacity to be seen under given conditions of distance, light, etc. [1575?85;