adjective
occurring twice a year
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The biannual report is due next month and must be submitted to the board of directors.
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We only have to do this biannual training twice a year, so it's not too bad.
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I always look forward to the biannual company picnic - it's a great time to relax and have fun.
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The biannual tradition of planting flowers in the garden signifies the changing seasons and the passage of time.