Simple past tense and past participle of rear-end.(verb)
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Use "rear-ended" in a sentence
"The government said a preliminary inquiry into Saturday's crash indicated that a lightning strike had caused one train to lose power, and that the second train then rear-ended it."
"Ford Motor Co. is by most reckoning on track towards a level of reliability that rivals Honda -- but they have to sell those cars to an audience where some are old enough to remember Ford Pintos exploding into flames when rear-ended."
"Gelman sped away in his mom's car to another part of Brooklyn, where he rear-ended a Pontiac, then stabbed the driver when he confronted Gelman about the crash, police said."