introvert Get Printable Handwriting (in-tro-vert) 3 syllables Learn It! Spelling Test Definition noun. a person characterized by concern primarily with his or her own thoughts and feelings; informal someone who is shy;verb. to turn inward Example Sentence I would characterized him as an introvert because he's shy. Synonyms shy; inward; loner; solitary Antonyms extrovert; outgoing Share with your friends: