In this chapter, unless the context otherwise requires:

1. 1. "Juror" means any person who is a member of any impaneled jury or grand jury, and includes any person who has been drawn or summoned to attend as a prospective juror.
2. 2. "Official proceeding" means a proceeding heard before any legislative, judicial, administrative or other governmental agency or official authorized to hear evidence under oath.
3. 3. "Physical evidence" means any article, object, document, record or other thing of physical substance.
4. 4. "Testimony" means oral or written statements, documents or any other material that may be offered by a witness in an official proceeding.
5. 5. "Threat" means a threat proscribed by section 13-1804, subsection A.