Webster's Revised Unabridged Dictionary · 1913

check out

check out , intransitive verb

1.
To vacate a room at a hotel, notel, etc. Converse of check in.
2.
To die. [Colloquial]

check out , transitive verb

1.
To inspect or examine. [Colloquial]
2.
To make a record of having borrowed (something) for temporary use; as, to check out a book at the library; to check out equipment from a depository.
3.
To bring (items to be purchased) to a checkout counter (as at a supermarket or other retail store) where the prices may be totaled and the bill may be paid.