day (dā)
n.
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6.
a. A specific, characteristic period in one's lifetime: In Grandmother's day, skirts were long.
b. A period of opportunity or prominence: Every defendant is entitled to a day in court. That child will have her day.

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7. A period of time in history; an era: We studied the tactics used in Napoleon's day. The day of computer science is well upon us.
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8. days Period of life or activity: The sick cat's days will soon be over.