Definition of "rival"
noun:
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A competitor (person, team, company, etc.) who is well known to another and has similar skills and achievements. Defeating a rival may be a primary or necessary goal of a competitor.
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Someone or something with similar claims of quality or distinction as another.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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verb:
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To oppose or compete with.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
To equal to or surpass another.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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