red-letter

[ red-let-er ]
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adjective
  1. marked by red letters, as festival days in the church calendar.

  2. memorable; especially important or happy: a red-letter day in his life.

  1. (of a Bible) having the quoted words of Jesus appear in red type: a red-letter edition;the red-letter New Testament presented at her baptism.

Origin of red-letter

1
First recorded in 1660–70

Words Nearby red-letter

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use red-letter in a sentence