1. Of or relating to: bacillary.
2. One that relates to or is connected with: boundary.
[Middle English -arie, from Old French, from Latin -ārius, adj. and n. suff.]
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.
1. (forming adjectives) of; related to; belonging to: cautionary; rudimentary.
2. (forming nouns)
a. a person connected with or engaged in: missionary.
b. a thing relating to; a place for: commentary; aviary.
[from Latin -ārius, -āria, -ārium]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a suffix with the general sense “pertaining to, connected with” the referent named by the base, occurring orig. in loanwords from Latin, as adjectives (elementary; honorary), personal nouns (secretary), or nouns denoting objects, esp. receptacles or places (library; glossary); in English it sometimes has the additional senses “contributing to,” “for the purpose of,” usu. forming adjectives: complimentary; inflationary.
[Middle English -arie < Latin -ārius, -a, -um; E personal nouns reflect -ārius, objects and places -ārium or -āria]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.