Okla. Stat. tit. 22, § 22-721: Definitions

"Witness" as used in this act shall include a person whose

testimony is desired in any proceeding or investigation by a grand

jury or in a criminal action, prosecution or proceeding.

The word "state" shall include any territory of the United

States and the District of Columbia.

The word "summons" shall include a subpoena, order or other

notice requiring the appearance of a witness.