(8) "Proceeding" means any threatened, pending, or completed action, suit, or proceeding, whether civil, criminal, administrative, arbitrative, or investigative and whether formal or informal.

(20) "Proceeding" means any threatened, pending, or completed action, suit, or proceeding, whether civil, criminal, administrative, or investigative and whether formal or informal.

(5) "Proceeding" means any meeting, hearing, trial, investigation, or other proceeding of any nature conducted by an agency.