contaminated

contaminated

1. simple past and past participle of contaminate

contaminated (comparative more contaminated, superlative most contaminated)

1. adulterated; impure
2. made unfit for use by the introduction of unwholesome or undesirable elements.
   • 2004, Phil Croucher, JAR Professional Pilot Studies, pages 12–6:

     A "contaminated" runway has over 25% of its surface area covered with standing water or slush (or loose snow) more than 3mm thick, or compressed snow and ice anywhere along the takeoff run or accelerate-stop surface.