A. "Commission" means the public utilities commission of the state;

B. "Person" includes individuals, firms, corporations, partnerships, and their agents and employees;

C. "Poles, overhead wires and associated overhead structures" mean poles, towers, supports, wires, conductors, guys, stubs, platforms, crossarms, braces, transformers, insulators, cutouts, switches, communication circuits, appliances, attachments and appurtenances located aboveground within a district and used or useful in supplying electric, communication or similar or associated service;

D. "Underground utility district or district" means that area in the city within which poles, overhead wires, and associated overhead structures are prohibited as such area is described in resolution adopted pursuant to the provisions of Section 14.36.030;

E. "Utility" includes all persons or entities supplying electric, communication or similar or associated service by means of electrical materials or devices.