01 n. A fixed point of time, usually an epoch, from which a series of years is reckoned.
pl.
Eras ((#))
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1.
A fixed point of time, usually an epoch, from which a series of years is reckoned.“The foundation of Solomon's temple is conjectured by Ideler to have been an era.” — R. S. Poole.
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2.
A period of time reckoned from some particular date or epoch; a succession of years dating from some important event; as, the era of Alexander; the era of Christ, or the Christian era (see under Christian). See: Christian“The first century of our era.” — M. Arnold.
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3.
A period of time in which a new order of things prevails; a signal stage of history; an epoch.“Painting may truly be said to have opened the new era of culture.” — J. A. Symonds.