adj. Believing in a single god, deity, spirit, etc., especially for an organized religion, faith, or creed.
the GNU version of the Collaborative International Dictionary of English
adj. Of or pertaining to monotheism.
The Century Dictionary and Cyclopedia
Of or pertaining to monotheism; of the nature of monotheism; believing in monotheism.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. believing that there is only one god
Word Usage
"The court's reasoning was that the posting of the commandments in the Kentucky courthouses constituted an expression of monotheistic religion but not so in Texas, where the commandments were seen as having more of a secular "educational" purpose."