What does "enharmonic" mean in music?

The term "enharmonic" in music refers to two tones that sound alike but have different names. An example of this is the note C sharp, which is enharmonically equivalent to D flat; they are played using the same key on a keyboard instrument but are notated differently depending on the musical context. This concept is important in music theory as it allows for flexibility in key signatures, scales, and harmonic functions. Understanding enharmonic equivalence is essential for interpreting music correctly and facilitating modulations between different keys. Other concepts listed, such as playing notes in succession, creating rhythms, or variations in dynamics, do not relate to the unique relationship defined by enharmonic tones.