an·ser·ine (?n?s?-r?n?, -r?n)adj.1. Of or belonging to the subfamily Anserinae, which comprises the geese.2. Of or resembling a goose; gooselike.[Latin ?nser?nus, pertaining to geese, from ?nser, goose; see ghans- in Indo-European roots.]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.anserine (?æns??ra?n; -r?n) or anserousadj1. (Zoology) of or resembling a goose2. (Zoology) of, relating to, or belonging to the subfamily Anserinae, which includes geese, swans, and certain ducks: family Anatidae, order Anseriformes3. silly; foolish[C19: from Latin anser?nus, from anser goose]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014an?ser?ine (?æn s??ra?n, -r?n) also an?ser?ous (-s?r ?s) adj. 1. of, pertaining to, or resembling a goose. 2. stupid; foolish; silly. [1830?40;