RCW 77.15.050
"Conviction" defined.

Unless the context clearly requires otherwise, as used in this chapter, "conviction" means a final conviction in a state or municipal court or an unvacated forfeiture of bail or collateral deposited to secure the defendant's appearance in court. A plea of guilty, or a finding of guilt for a violation of this title or rule of the commission or director constitutes a conviction regardless of whether the imposition of sentence is deferred or the penalty is suspended.

[1998 c 190 § 6.]