the GNU version of the Collaborative International Dictionary of English
n. One who believes that there is but one God.
The Century Dictionary and Cyclopedia
n. One who believes that there is but one God.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a believer in one god
Word Usage
"If there's a tendency within monotheist religions for conservative moralism to dominate progressive ethics -- as I think there is -- any lack of resolve on the part of the progressives in defying the conservatives is bad news for us all."