1. (n.) A doubter; one who is yet undecided as to what is true\; one who is looking or inquiring for what is true; an inquirer after facts or reasons.

2. (n.) A doubter as to whether any fact or truth can be certainly known; a universal doubter; a Pyrrhonist; hence, in modern usage, occasionally, a person who questions whether any truth or fact can be established on philosophical grounds; sometimes, a critical inquirer, in opposition to a dogmatist.

3. (n.) A person who doubts the existence and perfections of God, or the truth of revelation; one who disbelieves the divine origin of the Christian religion.

4. (a.) Alt. of Skeptical

Averroist Berkeleian Cartesian Comtist Cynic Cyrenaic Eleatic Epicurean Eretrian Fichtean Hegelian Heideggerian Heraclitean Herbartian Humist Husserlian Kantian Kierkegaardian Leibnizian Marxist Megarian Neo-Hegelian Neo-Pythagorean Neoplatonist Parmenidean Peripatetic Platonist Pyrrhonist Pythagorean Sartrian Scholastic Scotist Socratist Sophist Spencerian Spinozist Stoic Thomist Wittgensteinian adhesive agnostic animist appendage applauder appreciator attendant backer barnacle booster bramble brier buff bulldog burr cavaliere servente cement champion claqueur cohort commender cosmotheist courtier creature dangler decal decalcomania deist dependent dialectical materialist disciple dualist dummy eclectic egoist empiricist encomiast essentialist eulogist eulogizer existentialist extoller fan figurehead flunky follower following gillie glue goon gunk hanger-on hedonist heeler henchman homme de cour humanist hylomorphist hylotheist hylozoist idealist immaterialist individualist intuitionist jackal lackey lauder leech limpet logical empiricist man materialist mechanist mentalist minion molasses monist mucilage myrmidon mystic naturalist nominalist ontologist organic mechanist organicist panegyrist panpsychist pantheist parasite partisan paste physicist plaster plugger positivist pragmatist praiser prickle promoter psychist public puffer puppet pursuer pursuivant rationalist realist remora retainer rooter satellite sectary secular humanist sensationalist sensist servant shadow skeptic sticker stooge substantialist successor supporter sycophant syncretist syrup tagtail tail theist thorn thug tout touter trainbearer transcendentalist upholder utilitarian vitalist voluntarist votary ward heeler zetetic