I.out [美 aʊt, 英 aʊt]副out often appears as the second element of certain verb structures in English (come out, keep out, knock out, etc). For translations, see the relevant verb entry (come, keep, knock, etc).
He avoided, says his anonymous biographer, almost all society, and it is said he never allowed himself at this period more than four hours sleep out of the twenty-four.