[ad-ven-tiv]Botany, Zoology
  1. an adventive plant or animal.

Origin of adventive

1595–1605, for an earlier sense; < Latin advent(us) advance, incursion (see advent) + -ive
Related formsad·ven·tive·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for adventive

Historical Examples of adventive

British Dictionary definitions for adventive


  1. (of a species) introduced to a new area and not yet established there; exotic
  1. such a plant or animal
Abbreviation: casual
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adventive in Science


  1. Not native to and not fully established in a new habitat or environment. An adventive plant may be locally or temporarily naturalized without finding conditions that allow it to spread more widely.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.