plural in form but singular or plural in construction
: the 15th day of March, May, July, or October or the 13th day of any other month in the ancient Roman calendar
broadly
: this day and the seven days preceding it
Cite this Entry
“Ides.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ides. Accessed 11 Sep. 2025.
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ides
plural noun
: the 15th day of March, May, July, or October or the 13th day of any other month in the ancient Roman calendar
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