The founder of Republican Rome, in the 6th century B.C.; affected idiocy (whence his name, meaning stupid); it saved his life when Tarquin the Proud put his brother to death; but when Tarquin's son committed an outrage on Lucretia, he threw off his disguise, headed a revolt, and expelled the tyrant; was elected one of the two first Consuls of Rome; sentenced his two sons to death for conspiring to restore the monarchy; fell repelling an attempt to restore the Tarquins in a hand-to-hand combat with Aruns, one of the sons of the banished king.