1. In ancient Rome, the 15th of March, May, July and October, and the 13th of the other months.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• idee,
• itdoes,
• idear,
• ideak,
• idias,
• ideams,
• oices,
• ises,
• egdes,
• aidds,
• ideat,
• widoes,
• iades,
• giudes,
• iles,
• idesa,
• udes,
• odest,
• itws,
• idel

• idles,
• idea,
• Dies,
• hides,
• idesia.

The plural of the "ides" can be the "ides".

The singular of the "ides" can be the "ides".