What is the name of the concentration level called when spirits are diluted before consumption?

The term "serving strength" refers to the concentration level when spirits are diluted before consumption. This process typically involves adding water or another mixer to spirits, reducing their alcohol content to a more palatable level for drinking. Serving strength is particularly relevant in bar settings, where spirits are often served at lower concentrations to enhance flavor and enjoyment without overwhelming the palate.

In contrast, "sipping strength" can refer to the alcohol content that is still high enough to deliver complex flavors when consumed neat, without dilution. "Proof strength" is a measure of the strength of the spirit but doesn't specifically indicate any dilution prior to consumption. "Barrel strength" indicates spirits that have not been diluted after aging in barrels and thus retain their high natural alcohol content straight from the cask. Understanding these distinctions helps clarify the process and purpose behind diluting spirits before serving them.