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| tri·en·ni·al [ trī énnee əl ] |
adjective |
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| Definition: |
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1. happening every 3 years: taking place once every three years
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2. lasting 3 years: lasting for a period of three years
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noun (plural tri·en·ni·als) |
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| Definition: |
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1. 3rd anniversary: a third anniversary of an event
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2. triennial event: an event that takes place every three years
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3. 3-year period: a period of three years
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| [Mid-16th century. < Latin triennis< triennium (see triennium)] |
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  tri·en·ni·al·ly adverb |
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