adjective
Etymology: from past participle of introvert (I)
1. : introversive:
a. : turned in upon itself
the introverted Old Kingdom did not carry on extensive intercourse with foreign lands — J.W.Curtis
b. : marked by introversion
the introverted young man given to odd moods and uncommunicativeness
— opposed to extroverted
2. of a quatrain : having an enclosed rhyme