I
adv. ~ out ('with the inner surface facing out'); ('thoroughly') (to know a subject ~ out)
USAGE NOTE: The compound preposition ~ of can refer to time or space. Referring to time, it is colloq. CE --to finish a job ~ of an hour; referring to space, it is colloq. AE --~ of a building.
II
n. ( colloq. )
confidential information
1) to have the ~ on
position of trust
2) to be on the ~