of old

of old idiom
Formerly, long since, at an earlier time, as in In days of old the whole town turned out to watch the parade. This somewhat archaic idiom dates from about 1400.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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