in·ter vi·vos (?n?t?r v??v?s?, v??-)adj. Law Between living persons: an inter vivos trust.[Latin inter v?v?s : inter, among + v?v?s, accusative pl. of v?vus, a living being.]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.inter vivos (??nt? ?vi?v?s) adj (Law) law between living people: an inter vivos gift. Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014in?ter vi?vos (??n t?r ?va? vo?s, ?vi-) adv., adj. (in law) between living persons; taking effect during the lifetimes of those involved. [1830?40;