Simple past tense and past participle of outrival.(verb)
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Use "outrivaled" in a sentence
"“Mark Twain, always interesting, in this book has outrivaled himself,” reported the Meriden Conn."
"When the party finally reached New York City, after a non-incidental flight of one night and the major portion of a day, they were given another ovation -- one which far outrivaled in volume the one they had received at Panama."
"The Argentine Republic is reputed to be the greatest producer of wool in the world, having outrivaled Australia in its annual output."