WordNet (r) 3.0 (2006):
Marcus Aurelius Antoninus n 1: Emperor of Rome; nephew and son-in-law and adoptive son of Antonius Pius; Stoic philosopher; the decline of the Roman Empire began under Marcus Aurelius (121-180) [syn: Antoninus, Aurelius, Marcus Aurelius, Marcus Aurelius Antoninus, Marcus Annius Verus]