Acidity, acidy, acid: Usually, the pleasant tartness of a fine coffee. Acidity, along with flavor, aroma, and body, is one of the principal categories used by professional tasters in cupping, or sensory evaluation of coffee.

When not used to describe cup characteristics, the term acidity may refer to pH, or literal acidity, or to certain constituents present in coffee that ostensibly produce indigestion or nervousness in some individuals.