RCW 50.04.080: Employer.

"Employer" means any individual or type of organization, including any partnership, association, trust, estate, joint stock company, insurance company, limited liability company, or corporation, whether domestic or foreign, or the receiver, trustee in bankruptcy, trustee, or the legal representative of a deceased person, having any person in employment or, having become an employer, has not ceased to be an employer as provided in this title.