'Monotheism' definitions:

Definition of 'monotheism'

From: WordNet
noun
Belief in a single God [ant: polytheism]

Definition of 'Monotheism'

From: GCIDE
  • Monotheism \Mon"o*the*ism\, n. [Mono- + Gr. ? god: cf. F. monoth['e]isme.] The doctrine or belief that there is but one God. [1913 Webster]

Synonyms of 'monotheism'

From: Moby Thesaurus