Simple past tense and past participle of coast.(verb)
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Use "coasted" in a sentence
"They rattled through the industrial outskirts of the capital, past refinery tanks and banana trees — and then, for no good reason, the train coasted to a stop."
"My family and I awoke, greeted by a spectacular show of autumn colors while our Capitol Limited Amtrak train coasted alongside a meandering river somewhere outside Martinsburg, West Virginia."
"` ` We just kind of coasted on defense and they built on their lead. ''"