adjective

Etymology: L scepticus < Gr skeptikos, thoughtful, inquiring < skeptesthai, to consider: altered by metathesis < IE base *spe-, to peer > spy

noun

1. a member of any of the ancient Greek philosophical schools that denied the possibility of any certain knowledge
2. a person who believes in or practices philosophical skepticism
3. a person who habitually doubts, questions, or suspends judgment upon matters generally accepted
4. a person who doubts religious doctrines