Atheist \A"the*ist\, n. [Gr. ? without god; 'a priv. + ? god: cf. F. ath['e]iste.] 1. One who disbelieves or denies the existence of a God, or supreme intelligent Being. 2. A godless person. [Obs.] Syn: Infidel; unbeliever.
Infidel \In"fi*del\, n. One who does not believe in the prevailing religious faith; especially, one who does not believe in the divine origin and authority of Christianity; a Mohammedan; a heathen; a freethinker. Syn: Infidel, Unbeliever, Freethinker, Deist, Atheist, Sceptic, Agnostic.
Freethinker \Free"think`er\, n. One who speculates or forms opinions independently of the authority of others; esp., in the sphere or religion, one who forms opinions independently of the authority of revelation or of the church; an unbeliever; -- a term assumed by deists and skeptics in the eighteenth century.
god n 1: the supernatural being conceived as the perfect and omnipotent and omniscient originator and ruler of the universe; the object of worship in monotheistic religions [syn: God, Supreme Being] 2: any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force [syn: deity, divinity, immortal] 3: a man of such superior qualities that he seems like a deity to other people; "he was a god among men" 4: a material object that is worshipped as a god; "thou shalt not make unto thee any graven image"; "money was his god" [syn: idol, graven image]
personification n 1: one who personifies an abstract quality 2: representing an abstract quality or idea as a person or creature [syn: prosopopoeia] 3: the act of attributing human characteristics to abstract ideas etc. [syn: incarnation]
abstract adj 1: existing only in the mind; separated from embodiment; "abstract words like `truth' and `justice'" [ant: concrete] 2: not representing or imitating external reality or the objects of nature; "a large abstract painting" [syn: abstractionist, nonfigurative, nonobjective] 3: based on specialized theory; "a theoretical analysis" [syn: theoretical] 4: dealing with a subject in the abstract without practical purpose or intention; "abstract reasoning"; "abstract science"
Emphasis added where deemed necessary. Definitions obtained via dict.org.