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simple past and past participle of contaminate examples
comparative more contaminated, superlative most contaminated
adulterated; impure examples
made unfit for use by the introduction of unwholesome or undesirable elements. quotations examples
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.
2004, Phil Croucher, JAR Professional Pilot Studies, pages 12–6